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Electrical Machines

Electrical Machines
When maximum starting torque is obtained, rotor power is

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Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?

 Capacitor start.
 Split phase type.
  Capacitor run type.
 Shaded pole type.

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Electrical Machines
The breakdown torque of a synchronous motor varies as

 1/V²
 applied voltage V
 1/V
 V²

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Electrical Machines
A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is

 0 Hz
 25 Hz
 50 Hz
 100 Hz

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Electrical Machines
The crawling in the induction motor is caused by

 low voltage supply
 improper design of stator laminations
 high loads
 harmonics developed in the motor

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Electrical Machines
The output power indicated on the name plate of any motor is always the

 Gross power.
 Power drawn in KW.
 Output power at the shaft.
 Power drawn in KVA.

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