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ELECTRICAL MACHINES

Electrical Machines
In which of the following motors DC excitation is not required?

 hysteresis motor
 reluctance motor
 3-phase synchronous generator
 3-phase synchronous motor

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Electrical Machines
Universal motors are used in

All of these
 cranes
 traction
 food processing

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Electrical Machines
A 3 phase stepper motor has 6 stator poles and 4 rotor poles, then find the step angle?

 30°
 45°
 60°
 10°

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Electrical Machines
Stepper motor is used in

 traction
All of these
 computer printers
 food processing

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Electrical Machines
Synchronous reactance of an alternator represents

All of these
 field winding reactance
 armature reactance and leakage reactance
 a reactance operating at synchronous speed

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