Low electrical resistance.
No electrical resistance.
High electrical resistance.
Without knowing the coupling factor the total inductance cannot be found.
Stay the same
Equal to the sum of the individual inductance.
Equal to the inductance of the highest rated inductor.
Less than the inductance of the lowest rated inductor.
70.7% of maximum value
63.2% of maximum value
63.7% of maximum value
Opposes the EMF producing it.
Does not affect the EMF producing it.
Aids the EMF producing it.
Both 1 and 3 true
Both 1 and 2 are true
Only 1 is true
The current is at a maximum
The current through it is zero
It will no longer accept lines of flux.
In the same direction of rotation of the armature.
In the opposite direction of rotation of the armature.
Into alignment with the GNA.
In a weaker field than a large air gap, for the same magnetising force.
In a stronger field than a large air gap, for the same magnetising force.
In the same field as a large air gap, for the same magnetising force.
Decrease speed and increase torque.
Increase speed and increase torque.
Increase speed and decrease torque.
Armature speed and number of series conductors.
Armature speed and field strength.
Armature speed and number of parallel conductors.
Continue to run in the same direction.
Reverse the electrical connections to either the field or armature windings.
Rotate the positive brush one commutator segment.
Interchange the wires which connect the motor to the external power source.
Rotates speed at which the armature
Strength of the magnetic field.
Number of conductors in the armature.
Few turns of thin wire.
Many turns of thin wire.
Few turns of thick wire. few turns of thick wire. few turns of thick wire.
Overcome armature reaction.
Reduce arcing at the brushes.
Reduce field strength.
Impedance at rated voltage.
Amperes at rated voltage.
Watts at rated voltage.
Speed of the motor can be more closely controlled.
Motor can be operated in either direction.
Power output of the motor can be more closely controlled.
Either, provided they lay on the MNA.
The same as the next main pole ahead in the direction of rotation.
The same as the next main pole behind in the direction of rotation.
Against the direction of rotation.
In the direction of rotation.
To the GNA.
Suitable for constant speed use.
High starting torque.
Low starting torque.
In series with the armature
In series with the field.
In parallel with the armature.
The same current as the field.
The same current as the armature.
Induces current in the generator.
Drum-wound armatures in combination with a negatively connected series field.
26 ohm in series with 2 ohm resistor
26 ohm in parallel with 2 ohm resistor
26 ohm in series with 1 ohm resistor
Same as source voltage
Mass of conductor
Material of conductor
The magnitude of EMF is indirectly proportional to the magnetic Flux
The magnitude of EMF is directly proportional to the rate of change of Flux
The magnitude of EMF is indirectly proportional to the rate of change of Flux