trigram

This is a table of type trigram and their frequencies. Use it to search & browse the list to learn more about your study carrel.

trigram frequency
by means of97
shown in fig86
end of the83
of the armature76
as shown in69
of the current69
so as to65
so that the63
the resistance of60
resistance of the57
one of the51
as in fig50
it will be48
in order to46
connected to the43
and the other43
the magnetic field42
of the commutator41
the direction of41
a current of40
of the coil39
terminal of the38
the field coils37
in series with35
contact with the35
the end of35
ends of the34
means of the34
the value of33
of the brushes33
of the needle32
in which the32
it may be31
the strength of31
a pair of31
what is the31
of the machine30
resistance in the30
of the galvanometer30
of the field29
current in the28
shown in the28
proportional to the28
of the motor27
as well as27
in the armature27
means of a27
the ends of27
in the circuit26
in the figure26
of the instrument26
direction of the26
the terminals of26
value of the26
the speed of25
may be used25
attached to the25
between the two25
is connected to25
pole of the25
so that it25
of a current25
in the case24
when a current24
connected in series24
current of electricity24
the armature is24
consists of a23
the current in23
part of the23
of the coils23
passes through the23
strength of the22
side of the22
leeds and northrup22
the voltage of22
in the same22
the amount of22
the number of22
the unknown resistance22
the case of22
is shown in22
it is not22
it is necessary21
deflection of the21
out of the21
it should be21
position of the21
the action of21
series with the21
in the direction20
lines of force20
to be measured20
that of the20
voltage of the20
the other end20
the use of20
the current is20
the armature circuit19
passing through the19
the galvanometer is19
a piece of19
of the dynamo19
provided with a19
terminals of the19
sparking at the19
of the two19
on the other19
is to be19
there is no18
watt hour meter18
there is a18
the current to18
an electric current18
the machine is18
it is a18
which may be18
surface of the18
of the battery18
as in the18
the pressure of18
of the magnet18
of the other18
of the rheostat18
the instrument is18
which it is18
action of the18
at one end17
the main switch17
due to the17
to the other17
the north pole17
of the wire17
that it is17
a deflection of17
may be made17
one terminal of17
of the machines17
should be used17
to make a17
speed of the17
the coils are17
should be taken17
if it be16
one or more16
and in the16
a magnetic field16
the standard cell16
the position of16
how is the16
will be seen16
the effect of16
the surface of16
and so on16
current passes through16
through the wire15
upon the commutator15
for the purpose15
with respect to15
in contact with15
method of testing15
should be done15
be seen that15
coils of the15
connected up with15
no voltage release15
the resistance in15
will not be15
each of the15
of the shunt15
a current is15
in making the15
to the right15
a and b15
movement of the14
length of the14
the secondary coil14
be necessary to14
the insulation of14
it consists of14
the bus bars14
for this purpose14
and the current14
on the scale14
to the left14
found to be14
the same as14
as it is14
the other terminal14
the whole of14
the method of14
positive and negative14
by the current14
will be found14
the pole pieces14
from each other14
direction of current14
current through the14
in connection with14
the current strength14
is necessary to14
contacts with the13
to be used13
two or more13
of the scale13
be used to13
and it is13
is liable to13
liable to be13
a number of13
of the same13
the current will13
it has been13
are connected in13
the operation of13
the series coils13
the other hand13
the current from13
the connections are13
is in the13
is called the13
other end of13
the fault is13
on the commutator13
of the starting13
into contact with13
should be carefully13
the machine will13
the needle is13
the bottom of13
is equal to13
shown by the13
current passing through13
pass through the13
at the brushes13
of all the13
if the machine13
out of circuit13
the resistance is13
the coil is13
north and south13
the brushes and13
one end of13
top of the13
as soon as13
of a magnet13
if the current13
and northrup fault13
the needle will13
indicated by the13
is made of13
northrup fault finder13
through the coil12
they should be12
whole of the12
the flow of12
cut out of12
equal to the12
to that of12
the fact that12
as shown by12
inches in diameter12
the purpose of12
current from the12
in the opposite12
number of turns12
the galvanometer needle12
heating of the12
the commutator and12
this is a12
what should be12
portion of the12
the form of12
dynamos in parallel12
the coils of12
of which is12
when the machine12
the opposite direction12
the center of12
the shunt field12
with the other12
placed in the12
be made to12
a short circuit11
the top of11
the quantity of11
in this case11
of the meter11
direction of rotation11
the brushes are11
the broken wire11
in one direction11
insulation of the11
the resistances of11
to the base11
of the resistance11
are connected up11
the deflection of11
the faulty coil11
short circuits in11
the length of11
at right angles11
bottom of the11
of the switch11
connected with the11
method of locating11
can be made11
of the line11
the south pole11
the commutator is11
is provided with11
of the cable11
a magnetic needle11
when the current11
a bar of11
to pass through11
the key is11
with no voltage11
battery and galvanometer11
passed through the11
the field circuit11
the positive terminal11
at which the11
to the shaft11
can be obtained11
of the case11
the movement of11
to the current11
adjustment of the11
if this be11
and from the11
through the armature11
with the commutator11
is indicated by11
north pole of11
a resistance of10
to hold the10
of an electric10
the current passing10
the field winding10
should not be10
be short circuited10
the difference between10
parallel with the10
to form a10
queen acme set10
the total resistance10
back of the10
operation of the10
when the armature10
dynamos in series10
a current passes10
to see that10
are shown in10
connection with the10
in order that10
a high resistance10
how to make10
be used on10
of turns of10
of the voltmeter10
care should be10
one side of10
with leeds and10
to the next10
it is the10
be used for10
insulated from each10
the negative terminal10
amount of current10
fall of potential10
there will be10
produced by the10
is connected in10
current to be10
a permanent magnet10
it is advisable10
the current flowing10
in the shunt10
of the magnetic10
used with a10
effect of the10
that when the10
which the current10
at the point10
the battery key10
the external circuit10
to the fault10
the starting box10
starting a motor10
any of the10
the upper end10
of the loop10
in armature circuit10
in the rheostat10
in the form10
so that they10
pressure of the10
is placed in9
will be deflected9
of the standard9
depending upon the9
the coils in9
and may be9
there are two9
this may be9
of the load9
of the electrical9
a form of9
fields of the9
of the latter9
right angles to9
the principle of9
be the case9
circuit with the9
sections of the9
other terminal of9
shows no deflection9
a coil of9
brushes should be9
at the other9
the testing set9
be used in9
if there be9
needle will be9
with each other9
difference of pressure9
the motor is9
and the negative9
made up of9
will be necessary9
the angle of9
is called a9
the brushes should9
through the coils9
and that the9
magnetic lines of9
when it is9
at the commutator9
may be readily9
this is the9
the current flows9
resistances of the9
the passage of9
the field magnets9
that the current9
as to the9
more or less9
at full speed9
the needle to9
resistance in series9
the machine be9
of the good9
the circuit is9
to determine the9
the difference of9
is passed through9
in circuit with9
as to be9
to build up9
of a dynamo9
center of the9
resistance in circuit9
of the base9
in the coil9
through the field9
flows through the9
some of the9
upper end of9
in the diagram9
of the circuit9
at the same9
the same direction8
of the unknown8
its upper end8
sent through the8
it is called8
be connected to8
the galvanometer will8
the other to8
the lines of8
and a current8
equal to that8
more of the8
it is made8
is the same8
are liable to8
from the other8
they may be8
to cut out8
what are the8
of the bar8
to the battery8
and the machine8
to receive the8
the brush holders8
of the wires8
passage of a8
of the cell8
the field magnet8
as the resistance8
depends upon the8
that it will8
main switch is8
of this type8
the armature and8
back to the8
the reading a8
connected up in8
in opposite directions8
height of the8
of the lever8
the current through8
the restraining force8
a large number8
the movable coil8
soon as the8
large number of8
in this way8
of the engine8
the good wire8
the brushes be8
magnetic action in8
the other side8
the needle of8
used as a8
is known as8
is attached to8
motion of the8
the same way8
the permanent magnet8
for the reason8
short circuits between8
compound dynamos in8
to the bus8
of the hand8
against the commutator8
be due to8
which tends to8
to the bottom8
is designed to8
this is done8
the fault may8
dynamo or motor8
in a circuit8
to use a8
what may be8
winding of the8
it can be8
bad adjustment of8
the presence of8
to carry the8
galvanometer shows no8
to measure the8
will be the8
it would be8
in the magnetic8
in such a8
or more of8
it is then8
of potential method8
current may be8
shunt and compound8
the starting lever8
the short circuit8
to keep the8
quantity of electricity8
the positive and8
capacity of the8
the necessity of8
are placed in8
in either direction8
the reason that8
up to the8
how are the8
should first be8
is proportional to8
making the test8
of electricity is8
be allowed to8
a dynamo or8
can be used8
a storage battery8
current to pass8
all the dynamos7
to the negative7
is done by7
but it is7
is the difference7
divided by the7
is produced by7
it must be7
that it may7
of the permanent7
the current passes7
the dynamo is7
the good and7
was found to7
short circuit in7
the commutator will7
is made to7
the binding post7
adjusting the brushes7
bad condition of7
in an electric7
the machine to7
to the needle7
the core is7
the armature should7
the rheostat is7
is capable of7
by a current7
of a battery7
positive terminal of7
directly proportional to7
given to the7
to obtain the7
as the voltage7
the armature coils7
in the field7
generated by a7
secured to the7
of a wire7
connected in parallel7
that the armature7
only necessary to7
is of the7
method of coupling7
in the above7
is that the7
the galvanometer key7
temperature of the7
the shunt circuit7
the hand regulator7
of which the7
so long as7
the off position7
the unit of7
the scale is7
must be made7
the shaft and7
the extended wire7
said with respect7
of the key7
directly with the7
owing to the7
this method is7
that they are7
connections of the7
the same time7
the wires are7
long as the7
to each other7
brought up to7
circuit is formed7
machine should be7
the plane of7
in the position7
with the galvanometer7
be cut out7
of the disc7
connected as in7
so arranged that7
breaks in armature7
dependent upon the7
the tangent galvanometer7
is due to7
will cause the7
on account of7
in like manner7
the dotted lines7
the fields of7
parallel to the7
is shown a7
on one side7
the voltmeter is7
when the key7
a pressure of7
multiplied by the7
this method of7
connections are made7
the slide wire7
direct deflection method7
is used in7
by armature resistance7
applied to the7
two pieces of7
the lever of7
is advisable to7
respect to the7
down to the7
known as the7
in a magnetic7
in which a7
of the pointer7
consists of two7
a wheatstone bridge7
which are connected7
with the positive7
assume that the7
to the brushes7
of a circuit7
by using a7
to turn the7
the known resistance7
it in the7
the starting rheostat7
with queen acme7
of two or7
of such a7
to receive a7
generated by the7
may be said7
the two coils7
from the commutator7
coil may be7
current flows through7
it is connected7
serves as a7
of a few7
through which the7
needle of a7
current will be7
through the galvanometer7
to the same7
to the post7
plane of the7
if the motor7
between a and7
showing method of7
the battery is7
of a galvanometer7
and the two7
what kind of7
made as in7
it is only7
a current which7
in starting a7
when the galvanometer7
used in the7
and inch thick7
as for instance7
up to speed7
a series of7
may be due7
be said with7
be done if7
the rear end7
to reduce the7
of the testing7
the faulty wire7
commutator and brushes7
the rate of7
when the dynamo7
mounted on the7
in the first7
the influence of7
should be examined7
of testing resistances7
away from the7
may not be6
the two stations6
and the load6
amount of resistance6
to the south6
account of the6
a variation of6
of wheatstone bridge6
of electrical energy6
influence of the6
current in a6
not to be6
of low resistance6
be measured is6
passes through a6
the magnetic needle6
a high voltage6
as a means6
instrument may be6
which is wound6
the resistance box6
must not be6
of the broken6
shown in figs6
what is called6
and into the6
to place the6
series dynamos in6
speed regulation of6
the production of6
angles to the6
in the base6
fault may be6
of fine wire6
in this manner6
coil of wire6
diameter of the6
the tangent of6
short circuit the6
known as a6
sides of the6
the point where6
thompson watt hour6
order that the6
of a small6
in the wire6
to the positive6
current generated by6
capable of being6
by steps of6
is accomplished by6
the lower end6
of the water6
it was found6
between the segments6
suspended by a6
be used with6
passed through a6
diagram showing method6
the first and6
the height of6
resistance between the6
has been found6
series with a6
back and forth6
current is flowing6
proportion of the6
that the brushes6
if the brushes6
to the off6
a closed circuit6
connected to a6
be noted that6
that the resistance6
of a shunt6
the sine galvanometer6
well as the6
the machine has6
should then be6
deflection of one6
be used as6
the resistance being6
to start a6
all the coils6
at both ends6
to the end6
the electric current6
due to a6
depends on the6
is difficult to6
found that the6
the cell to6
may be obtained6
circuit may be6
edge of the6
are designed to6
a standard cell6
the armature or6
in case of6
should be removed6
illustrated in fig6
lever of the6
to bring the6
which is the6
the primary coil6
with the negative6
the pivot pin6
there be a6
division on the6
axis of the6
the zero position6
of the bridge6
are connected as6
how is a6
parts of the6
a combination of6
in one second6
the machine should6
the magnetic lines6
the construction of6
moved to the6
see that the6
the binding posts6
should be noted6
of a series6
the brushes will6
the positive pole6
to the terminals6
from which the6
to prevent the6
hydrogen and oxygen6
the temperature of6
with the battery6
the product of6
is obtained by6
a direct current6
is composed of6
the range of6
of each of6
to make the6
the battery and6
of the angle6
through a wire6
an increase of6
a was found6
by short circuiting6
current flowing through6
the moving element6
may be measured6
the diameter of6
the no voltage6
of an ohm6
greater than the6
is only necessary6
this fault is6
so that a6
is cut out6
through the wires6
the varley loop6
and out of6
is such that6
inches wide and6
into and out6
the generation of6
greater or less6
it is obvious6
in the other6
shunt dynamos in6
in proportion to6
a shunt dynamo6
to have a6
a method of6
a few turns6
they are not6
the switch is6
one of which6
until the galvanometer6
switch is closed6
the pressure at6
as low as6
lower end of6
a column of6
be carefully examined6
a dynamo is6
by moving the6
to connect the6
the commutator be6
being connected to6
close to the6
to the binding6
an electric circuit6
will flow through6
testing set battery6
speed at which6
column of mercury6
shunt field resistance6
is mounted on6
it is possible6
in parallel with6
has a wire6
of an inch6
of the connections6
may also be6
that there are6
line post c6
a complete circuit6
the axis of6
the shunt coils6
and unknown resistance6
bar of iron6
to the line6
sulphuric acid voltameter6
the commutator with6
in a dynamo6
machine will not6
is used for6
of a magnetic6
as to cut6
at its terminals6
flow of the6
rotation of the6
provision is made6
is suspended by6
as a rule6
dynamos to run5
of the magnets5
the potentiometer circuit5
in addition to5
the armature of5
light contact points5
of a motor5
the first method5
which can be5
order to determine5
on the shaft5
from end to5
end to the5
water in the5
is simply a5
with a hole5
a length of5
to the first5
the distant end5
the middle of5
a battery and5
flow from the5
resistance being tested5
must be taken5
of the electric5
wide range of5
piece of wire5
in such cases5
if due to5
was found that5
the armature winding5
break in the5
voltage and overload5
the armature will5
with a battery5
to change the5
method of measuring5
about the same5
will give the5
of the brush5
is the effect5
caused by the5
pressure at the5
how should the5
starter with no5
at each end5
by this means5
of leeds and5
by inserting resistance5
the field strength5
no voltage and5
be found to5
to increase the5
the two main5
point on the5
in all cases5
method with queen5
and the latter5
the forward end5
the bridge arm5
it has a5
a binding post5
is directly proportional5
and the voltage5
the base is5
switch should be5
to the motor5
current is sent5
reading a was5
such as a5
the machine may5
move the lever5
connected as shown5
diagram showing connections5
the result of5
to cause the5
and therefore the5
the fall of5
the series field5
that they will5
it is desirable5
all the resistance5
light load adjustment5
so that when5
as the load5
ratio between the5
the polarity of5
at the center5
be multiplied by5
the advantage of5
inch in diameter5
what provision is5
a soft iron5
rush of current5
is made in5
on the same5
and one of5
in the direct5
used in connection5
of the shaft5
it will not5
against the restraining5
and the like5
ends of a5
removed from the5
but when the5
out by the5
made by means5
in a direction5
armature and shunt5
in other words5
range of the5
is sent through5
from the north5
are the same5
coil and the5
at a distance5
use of the5
double throw switch5
wire and the5
of one of5
the whole current5
located by the5
it is used5
arranged as in5
through the instrument5
joined to the5
the water in5
voltage in the5
of electricity in5
another piece of5
in the resistance5
the other set5
and at the5
the decade plan5
be desired to5
of hard rubber5
this form of5
breaks in the5
the oil is5
the motor will5
terminals of a5
reduce the speed5
made by the5
midway between the5
be obtained by5
is connected up5
mounted on a5
good and bad5
by shunt field5
it is of5
of the core5
the connections and5
the brushes bear5
which is attached5
are made as5
the wire is5
turns of fine5
the bus bar5
so that if5
have to be5
strength of current5
from the magnet5
as shown at5
term applied to5
the murray loop5
and the reading5
the international ohm5
with the shaft5
compared with the5
run in parallel5
voltage of a5
be understood that5
is connected as5
at a time5
of the bearings5
the negative plate5
what is known5
be connected in5
coils may be5
is of such5
of the winding5
wire of the5
to serve as5
the galvanometer and5
under these conditions5
and shunt field5
of which are5
from the battery5
voltage release magnet5
of the conductor5
the current may5
angle of the5
the motion of5
a current in5
the rheostat and5
be remedied by5
starting the motor5
the induction coil5
the alternating current5
difference of potential5
a good wire5
with the plate5
volts and amperes5
of each machine5
a charge of5
seen that the5
in most cases5
how should a5
the cable or5
the current be5
proportion to the5
the tenths switch5
out of contact5
run from the5
the connections of5
and the armature5
is moved to5
the other machines5
the ratio between5
coils of a5
the back of5
principle of the5
the brushes must5
from a battery5
to provide a5
will produce a5
to full speed5
is divided into5
simplest form of5
with a single5
the point of5
to which the5
case of the5
there are several5
the instrument may5
the volume of5
section of the5
in the center5
just the same5
middle of the5
a current will5
the coil and5
fact that the5
a set of5
as the armature5
of pressure between5
the tips of5
in place of5
the negative pole5
and the short5
it be desired5
is made by5
will pass through5
enclosed in a5
and the connections5
that there is5
armature of the5
inserting resistance in5
or in the5
in opposition to5
end of a5
current to flow5
in each case5
not in use5
may be connected5
the edge of5
the bar a5
be placed in5
flows from the5
same as the5
unknown resistance is5
at the back5
a means of5
contact of the5
direct current dynamo5
magnetic field of5
to do the5
be the same5
be put in5
will be understood5
less than the5
as indicated by5
are provided with5
up with the5
is obvious that5
to the upper5
carrying a current5
broken wire and5
starting a dynamo5
to its original5
the latter is5
insufficient residual magnetism5
to the ground5
share of the5
indication that the5
to reverse the5
at the terminals5
be found that5
be in the5
when the switch5
one pole of5
in a certain5
and for the5
in the middle5
will be heated5
turns of wire5
first and second5
distance to the5
the insulation between5
end to end5
is dependent upon5
flow through the5
voltage between the5
from the foregoing5
coils are connected5
due to bad5
when there is5
a shunt machine5
end of this5
a portion of5
a few minutes5
that it can5
opposition to the5
ray of light5
resistance is cut5
be made with5
of the block5
we have a5
insulation between the5
point where the5
of rotation of5
will be indicated5
by the resistance5
to give the5
the best results5
are to be5
degree of accuracy5
the motor be5
placed at the5
galvanometer is connected5
brushes and commutator5
arrangement of the5
which is of5
the path of5
the deflections of5
through the resistance5
in the main5
in diameter and5
and overload release5
rear end of5
a solution of5
of the condenser5
is the result5
terminals are connected5
volume of gas5
action in dynamo5
of the first5
differential galvanometer method5
wide and inch5
by the number5
is used to5
current from a5
angle of deflection5
of the system5
is as follows5
terminal to the5
on either side5
in position by5
wire in the5
in the two5
same as in5
are as follows5
post and the5
be made as5
a and c5
which is to5
means of an5
with the armature5
the second method5
with one terminal5
the main line5
that the bearings5
through the shunt5
case of a5
which has a5
made as shown5
placed in a5
the u tube5
that the machine5
the box is5
the ratio coils5
in the following5
and the motor5
the resistance between5
two kinds of5
are in the5
of a conductor5
the first contact5
it is difficult5
current will flow5
its lower end5
as to form5
in the series5
the load is5
the simplest form5
may be remedied5
field of a5
by varying the5
with a standard5
the galvanometer deflection4
how does the4
applied to a4
what precaution should4
so that its4
the size of4
when the brushes4
that this is4
connections for the4
the needle be4
it is usually4
of the ordinary4
by the magnetic4
by this method4
of the various4
to a greater4
magnetic field at4
if we have4
the magnet and4
of the plate4
in a measure4
be passed through4
the scale of4
the load upon4
of insulated wire4
wires in a4
cut out by4
across the terminals4
as a motor4
that in the4
the rated capacity4
few turns of4
of the electrodes4
set up in4
the base and4
acted upon by4
the armature to4
of the box4
the reverse voltage4
if the voltage4
from right to4
likely to be4
coil is wound4
values of the4
operator at station4
may be located4
and northrup potentiometer4
telescope and scale4
line with the4
over a wire4
type of resistance4
form of a4
output of the4
to the correct4
due to this4
the course of4
go through the4
fall of pressure4
are cut out4
for a variation4
combined armature and4
connecting up the4
of a coil4
of eddy currents4
is taken of4
on the wire4
according to the4
twice the angle4
to the coils4
shunt or compound4
a represents the4
which will be4
in a motor4
to run in4
for measuring the4
the coil of4
standard of measurement4
brushes of the4
from the armature4
the failure to4
swing to the4
the defective wire4
in either case4
the voltage between4
used to measure4
if the fault4
switch be closed4
to which a4
polarity of the4
the posts marked4
in the latter4
leads from the4
that due to4
is enclosed in4
for a short4
when the loop4
machines may be4
the surrounding air4
contact on the4
should be tested4
result is that4
armature circuit of4
a galvanometer is4
the credit of4
simple electric heater4
with levelling screws4
comparison with a4
it is mounted4
of the voltage4
action of a4
circuit to the4
with a resistance4
solution of copper4
precaution should be4
that the contact4
is placed at4
of heavy wire4
at an angle4
measured is passed4
that the needle4
the current which4
a binding screw4
is the resistance4
portable testing set4
coil will be4
frame of the4
the magnet is4
within the magnetic4
on each side4
or in parallel4
to produce the4
lead to the4
the battery post4
to complete the4
to do this4
to measure a4
order to prevent4
and on the4
this be not4
for the various4
on the top4
charge of electricity4
shunt field circuit4
piece of metal4
ammeters and voltmeters4
should have a4
arms of the4
set of brushes4
voltmeter is connected4
winding consists of4
arms a and4
a shunt motor4
done if the4
for speed regulation4
forward end of4
which is in4
there is also4
the iron surface4
can be readily4
place of the4
made in the4
advantage is taken4
the winding of4
as may be4
likely to occur4
it is well4
and provided with4
bar test for4
commutator with a4
dynamo may be4
the armature wires4
to the rheostat4
the handle of4
method of repairing4
one end to4
excessive heating of4
it is best4
of the faulty4
of the set4
the choking coil4
indicated by a4
tips of the4
in the pole4
the main knife4
by a single4
of the darts4
details of the4
in the chapter4
necessary to connect4
be reversed by4
out of parallel4
moving the lever4
the line post4
connections between the4
from left to4
the potentiometer is4
cross section of4
a short coil4
coupling series dynamos4
the load will4
the frame of4
by the two4
various types of4
with the field4
on the resistance4
directly into electricity4
and is the4
from the copper4
at the time4
it is to4
from a to4
main knife switch4
adopted by the4
a difference of4
of electricity passes4
balance is obtained4
to a certain4
the two ends4
the commutator end4
of the transmitter4
to regulate the4
the dynamo was4
ten ohm coils4
there are three4
be located by4
the potentiometer reading4
should be opened4
of the dial4
are connected to4
the dynamo to4
the operator at4
the long coil4
to which is4
the queen acme4
the extreme right4
is wound with4
the positive lead4
with the load4
so far as4
the human eye4
pressure upon the4
the meter is4
u and v4
side of a4
to overcome the4
to the moving4
little or no4
oil should be4
the moment the4
with which it4
dynamo into and4
motor starting rheostats4
the coils be4
on constant voltage4
of the large4
because they are4
of the plates4
a temperature of4
should be thoroughly4
from the table4
the rheostat resistance4
oscillations of the4
extreme right hand4
the brushes of4
the normal speed4
do the work4
may be rotated4
while the other4
a very simple4
to be short4
running to the4
is in contact4
then the current4
the motor has4
it does not4
must be a4
zinc and copper4
field and the4
larger than the4
the positive plates4
armature or commutator4
has been the4
two main conductors4
other piece of4
the two pieces4
which they are4
this should be4
of the different4
in a cable4
and the instrument4
a means whereby4
of resistance is4
the adjusting screw4
may be shunted4
can be connected4
in the box4
in a wire4
the arms of4
the right hand4
the location of4
may be of4
at any time4
by the weight4
circuit through the4
as the speed4
to operate the4
and bad wires4
across the line4
of a volt4
the reading is4
coils will be4
of gas liberated4
the maximum speed4
inserted in the4
base of the4
circuit in the4
circuits between sections4
on which the4
is placed a4
will now be4
a variety of4
diagram of the4
in its character4
the distance to4
obtained by the4
in the insulation4
sure that the4
up in the4
right hand dial4
has been made4
field of the4
coils can be4
up to full4
connected across the4
of the earth4
a resistance in4
certain amount of4
this has been4
to the credit4
bridging across the4
may be cut4
varies with the4
use of a4
generated in the4
mounted upon a4
in the reservoir4
to a current4
detect and measure4
made of hard4
the study of4
should be reversed4
this is called4
the pressure in4
be found in4
cut out the4
the apparatus is4
it is therefore4
not be affected4
between the first4
the recording pen4
the first to4
through the two4
series coils of4
division of the4
under such circumstances4
to occur in4
point in the4
the removal of4
it is an4
an intense heat4
upwardly through the4
the causes of4
they are liable4
making hydrogen and4
through the magnetic4
and the field4
the field windings4
which has been4
to cause a4
are wound with4
short circuiting the4
directly to the4
by the dotted4
the properties of4
the switch f4
of a voltmeter4
to be connected4
that it cannot4
it is now4
the current relay4
at all times4
as it were4
and then the4
location of opens4
to deflect the4
construction of the4
the base has4
us assume that4
the base of4
a device which4
resistance must be4
the capacity of4
be removed from4
to be tested4
to be found4
the measurement of4
a standard of4
is used as4
the shunt resistance4
the latter may4
if a current4
that when a4
inch wide and4
between the ends4
the bad wire4
l is the4
a device for4
the residual magnetism4
for the current4
too great a4
designed to carry4
at the bottom4
of the pipe4
distance from the4
right to left4
south pole of4
increase of load4
of magnetic metal4
heavy sparking at4
will not build4
a wide range4
the movements of4
is not a4
of testing for4
to the resistance4
it is more4
for the work4
and must be4
made of a4
so it will4
pieces of the4
of electric iron4
bar to bar4
connecting the field4
see that they4
that if we4
the battery circuit4
a current to4
will probably be4
direct to the4
reference to a4
be shut down4
a certain amount4
any number of4
be out of4
of the light4
to the bell4
currents in the4
wire may be4
around the coil4
coils are wound4
the field and4
the galvanometer shows4
of a short4
inch thick and4
no current in4
an iron core4
a very high4
should the voltage4
with a pair4
on open circuit4
at the bus4
the post f4
is connected with4
held against the4
the voltage is4
it is evident4
at the zero4
is mounted a4
and compound dynamos4
the sensitiveness of4
be of the4
left to right4
right hand side4
the load on4
than the other4
the motor should4
each side of4
and the upper4
on the next4
no resistance in4
should the brushes4
on which is4
up with a4
more than a4
by applying the4
from another dynamo4
crown of cups4
outside of the4
hot wire instruments4
of the ammeter4
of the whole4
on the left4
a primary battery4
size of the4
it is also4
to follow the4
the pressures of4
one of these4
directly over the4
a tangent galvanometer4
coupling compound dynamos4
will thus be4
piece of iron4
rise of temperature4
field coils of4
of potential between4
machine may be4
with a galvanometer4
uniform cross section4
top view of4
to the commutator4
with a wire4
shape of the4
between the poles4
the insulation is4
which the motor4
so the current4
this is shown4
dynamo should be4
that it was4
to the scale4
as quickly as4
in the operation4
constant voltage circuits4
attention should be4
operate the motor4
how may the4
produce a deflection4
taken from the4
which is a4
the two electrodes4
with a large4
by measuring the4
the instruments are4
ratio coils are4
frame or core4
to which it4
reading of the4
the connections for4
of the ratio4
the armature chamber4
an open circuit4
switches as shown4
bridge arm b4
obvious that the4
which has the4
are made by4
field magnet cores4
under these circumstances4
an alternating current4
in series or4
for which the4
in the coils4
at the distant4
may be put4
be taken in4
inserted in series4
restraining force of4
and should be4
as far as4
below normal speed4
no deflection when4
with this arrangement4
the resistance coil4
in the usual4
amount of speed4
be done by4
the efficiency of4
adjustment of brushes4
and hold it4
an arc lamp4
be given to4
that the insulation4
are attached to4
pieces of magnetic4
of deflection of4
needle of the4
pressure of this4
part of it4
and b and4
is not in4
with one of4
good wire and4
what does the4
and the galvanometer4
a small hole4
to give a4
because the resistance4
brought into contact4
must be used4
the normal index4
the line wires4
the heating of4
in the path4
that the magnetic4
action in motor4
let us assume4
you will note4
of the total4
of the belt4
where it is4
furnished with the4
a convenient method4
given by the4
quickly to rest4
the segments are4
voltaic or galvanic4
in cross section4
a dynamo be4
the insulation resistance4
terminals of each4
readily estimated to4
can then be4
acting on the4
at its upper4
of a commutator4
credit of the4
the armature current4
is a very4
will be as4
and the secondary4
upon what does4
strength of a4
current is passed4
a compound dynamo4
of tangent galvanometer4
of ratio coils4
of the electro4
are called the4
of the series4
regulation by armature4
from one pole4
and if the4
the wire of4
decade can be4
should be given4
is wound to4
m and n4
the difference in4
the tension of4
at which it4
is the indication4
on the bridge4
there must be4
post of the4
resistance of a4
should not exceed4
to the strength4
circuit of the4
is the most4
made as follows4
and the brush4
stations in circuit4
at any point4
with the frame4
it is better4
for use with4
that they may4
of the metal4
subjected to a4
movement of a4
machine is started4
be adjusted to4
in the illustration4
to a column4
tenths switch and4
should be connected4
before starting a4
motor should be4
the neutral plane4
a series machine4
at the top4
the current used4
diagram of connections4
between sections through4
of excessive voltage4
after which it4
held in the4
upon a magnetic4
cut in the4
the result is4
switches u and4
passing through a4
the bridge is4
one of them4
a part of4
of a pair4
of the deflection4
connection with a4
the machines is4
in a telephone4
remedy is to4
by connecting the4
if the wire3
take care of3
up with one3
through frame or3
pressures of the3
the impure sheet3
should be of3
current which has3
is made with3
when a dynamo3
from north to3
remain the same3
put in the3
wires from the3
the cell or3
break down the3
of a cell3
of resistance in3
also passes through3
of the single3
instruments are connected3
a short time3
not in the3
with frictional electricity3
to oppose the3
and this is3
magnetic vane instrument3
the sine of3
will give a3
the needle in3
the number plate3
contact with each3
a current from3
the other line3
form of the3
the right or3
to be destroyed3
will be no3
to the secondary3
when the resistance3
is in series3
are made in3
the bridge arms3
the circuit when3
storage or secondary3
that the small3
of this fault3
are made up3
heat may be3
as a consequence3
diagram shows the3
to one side3
inner end of3
points north and3
the connection is3
for determining the3
thence through the3
down on the3
engage with the3
the direction in3
currents may be3
of the tangent3
and the wires3
a band of3
from one of3
special loop test3
the remaining coils3
it consists essentially3
as it will3
the moving system3
disconnected from the3
that the setting3
and you will3
on both sides3
call the reading3
the scale s3
will prevent the3
determined by the3
to prevent this3
is supposed to3
point to the3
by adjusting the3
of the needles3
run in a3
circuits between adjacent3
iron type instrument3
there be any3
instrument is made3
the bar d3
is brought up3
of locating a3
either direct or3
be kept clean3
high resistance wire3
be compared with3
such a way3
the motor at3
stop a motor3
high resistance and3
that the fault3
the fact will3
dynamos and motors3
to the block3
reason that the3
variation of of3
a wire or3
a current through3
be taken to3
the several dynamos3
and the dynamo3
in the second3
will be less3
this purpose a3
the resistance to3
the two branches3
condition of commutator3
the united states3
the position st3
the pointer at3
at about the3
from a few3
through the holes3
force of the3
the position shown3
be made at3
the differential galvanometer3
are made of3
brushes and the3
electricity passes through3
should be adjusted3
obtained from the3
brushes not properly3
connected direct to3
positive or negative3
must be kept3
which the galvanometer3
be altered by3
the negative plates3
adapted to receive3
piece of apparatus3
in the top3
to the armature3
the greater the3
of the customer3
the setting marks3
made of metal3
well as in3
for about a3
the brushes upon3
where l is3
bore a hole3
will tend to3
this means that3
to be grounded3
known to be3
eddy currents in3
magnetic field is3
the battery of3
coils from the3
be shunted with3
brushes in a3
is connected across3
ohm coils for3
at full load3
the instrument has3
in that the3
is found in3
to be accurately3
the post ba3
and method of3
location with leeds3
the equalizing connection3
to acquire the3
electric hand purifier3
to be the3
should be closed3
the leads from3
to the iron3
the arm b3
be possible to3
the main circuit3
of the equalizer3
not be used3
test for grounded3
in the ordinary3
the other dynamos3
permanent magnet m3
a balance is3
the field with3
equivalent to a3
series or in3
arranged so that3
speed reduction obtainable3
if the instrument3
the grid is3
current strength in3
quarter of an3
a quarter of3
to the magnet3
the terminal of3
of current in3
to the passage3
and a new3
coils and the3
the coils and3
the hand to3
could be made3
and to the3
a spiral spring3
the commutator as3
would be difficult3
the wall or3
coil or coils3
coils be connected3
the needle through3
in a battery3
through the meter3
and the resistance3
down the engine3
those of the3
the object of3
of the springs3
stationary when the3
the field of3
of the spool3
what is a3
the interior of3
the working parts3
which carries the3
by the other3
the distance between3
to protect the3
a distance of3
speed of a3
the body of3
prevent the machine3
instrument has a3
tendency for the3
is a common3
the machine do3
is made up3
of the fault3
the voltage rises3
is generated by3
will make a3
tends to turn3
the dimensions of3
such as to3
to the pressure3
serve as a3
battery is connected3
each of these3
arrangement of resistances3
the plug is3
different ways of3
voltage will be3
a charged wire3
offered by the3
it there for3
resistance may be3
made in a3
that the commutator3
constructed on the3
the correct positions3
current between the3
large amount of3
the cell is3
far as the3
formed through the3
speed in the3
which passes through3
wire being connected3
shunt wound motor3
field coils and3
of short circuits3
is independent of3
it to the3
a wooden base3
when used with3
short circuited armature3
pressure on the3
when connected in3
go to the3
to and from3
in the receiver3
the basis of3
north pole to3
with the instrument3
the various parts3
being the number3
between the field3
a large conductor3
pieces of metal3
used for measuring3
or at any3
to guard against3
flowing through the3
to reverse itself3
the rheostat arm3
load upon the3
adapting it to3
being designed to3
two coils of3
the law of3
an angle to3
with a short3
regulating the speed3
end to a3
angles to each3
this is accomplished3
to disconnect the3
the perfect coils3
from this cause3
constructed as a3
resistance out of3
then close the3
varying the speed3
off the commutator3
the total length3
suspended at the3
be discovered by3
station to the3
the light is3
of the fact3
a multiplier is3
be indicated by3
least sparking occurs3
taken of this3
the two outer3
to bad adjustment3
at its lower3
the line a3
current and the3
between any two3
the plugs are3
if the field3
up so that3
as we have3
regulate the pressure3
or another dynamo3
than the perfect3
series field winding3
quickly as possible3
uncertainty as to3
a difference in3
one end a3
that the deflection3
the contact on3
a resistance to3
base is a3
moisture in the3
otherwise the machine3
place the double3
is within the3
inch below the3
short circuits the3
current by the3
as would be3
strain on the3
holes in the3
causes of excessive3
or short circuited3
to the two3
magnet to the3
which is not3
the dynamo may3
an electric bell3
foregoing it will3
having thereon a3
of one or3
not only the3
contact faces of3
the other pole3
is merely a3
the left hand3
the double pole3
of the queen3
the resistance wire3
the resistance employed3
and the core3
an aluminum disc3
occur when the3
switch for a3
the galvanometer terminals3
the wire being3
to measure high3
the adjustment of3
with the same3
and measure electricity3
with a cloth3
tend to turn3
resistance box is3
negative terminal to3
the dynamo will3
an induction coil3
make a complete3
to the electro3
within is a3
the inner end3
making good contact3
two equal currents3
circuits in armature3