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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Regenerative.
  Plugging.
  None of these.
  Dynamic.

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Electric Circuits
Capacitors for P.f correction are rated in

 KVAR.
 KV.
 KVA.
 KW.

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Electric Circuits
From the circuit diagram shown in question 1 find the thevnin voltage.

 5 V.
 3 V.
 1.5 V.
 15 V.

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Electric Circuits
VRN, VYN and VBN are three phase voltage of a balanced three phase system. If VRN = 200∠30o V and VBN = 200∠- 90o V, then phase sequence of the system is

 BRY.
 YRB.
 RYB.
 RBY.

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Electric Circuits
A constant voltage source has

 minimum efficiency.
 high internal resistance.
 low internal resistance.
 minimum current capacity.

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Core.
 Inductance.
 Air gap.
 Coil.

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MORE MCQ ON Electric Circuits

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