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Electrical Machines

Electrical Machines
A DC generator can be considered as

 power pump.
 rectifier.
 rotating amplifier.
 prime mover.

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Electrical Machines
A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm?

  Can be determined.
 20 Hz.
  30 Hz.
 35 Hz.

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Electrical Machines
Which type of motors are preferred in lifts?

 DC shunt motors.
 DC compound motors.
 DC series motors.
None of these

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Electrical Machines
If B is flux density, l the length of the conductor and v the velocity of the conductor, then emf is given by

 Bl2v.
 Bl2v2.
 Blv2.
 Blv.

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Electrical Machines
Which of the DC Motor use flywheel?

 Shunt motor.
 Cumulatively compound motor.
 Differently compared motor.
 Series motor.

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Electrical Machines
Diverters are used only in

None of these
 series motors
 either of these
 shunt motors

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