Electrical Machines
The slip of an induction motor normally does not depend on which of the following?

  Core loss component.
 Shaft torque.
 Synchronous speed.
 Rotor speed.

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Electrical Machines
A dc shunt generator, when driven without any excitation, showed an open circuit voltage of 12 V. When the field winding was excited, the voltage dropped to zero. It happened because

 there was a break in the armature circuit
 field resistance was higher than critical resistance
 field winding was wrongly connected
 there was no residual magnetism in the field circuit

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