## Electrical Machines When Flemings right hand rule to find the direction of induced emf, the thumb points towards

direction of motion of the conductor.
opposite to the direction of motion of the conductor.
direction of induced emf.
direction of flux.

## Electrical Machines Methods of synchronizing of alternator may be done by

all dark lamp method.
all bright lamp method.
all of these.
one dark two bright.

## Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred?

Stepper motor.
DC differential compound motor.
Slip ring induction motor.
Synchronous motor.

## Electrical Machines If a transformer has turns ratio K, the primary and secondary current are I1 and I2 respectively and magnetizing current and core loss component of no load current IÃŽÂ¼ and Iw respectively, then

I1 = KI2 + Iw + IÃŽÂ¼.ok
I1 = KI2 + IÃŽÂ¼.
I1 = KI2.
I1 = KI2 + Iw.

## Electrical Machines In a DC generator the emf generated by the armature is maximum when

shaft rotation is high.
rate of change of flux is maximum.
induced voltage is high.
rate of change of flux is minimum.