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Electric Circuits

Electric Circuits
The form factor of sinusoidal alternating current is

 1.11.
 0.
 1.
 1.15.

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Electric Circuits
A constant voltage source has

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

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Electric Circuits
In which braking back emf exceeds supply voltage?

  None of these.
  Dynamic.
  Regenerative.
  Plugging.

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Electric Circuits
What is the reactive power in AC operation?

 Real power × sinθ.
 Apparent power × sinθ.
 Real power × cosθ.
 Apparent power × cosθ.

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Electric Circuits
The efficiency in case of maximum power transfer theorem is

 100 %.
 50 %.
 50 % - 100 %.
 less than 50 %.

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Electric Circuits
A constant current source supplies a electric current of 300 mA to a load of 1 KΩ. When the load changed to 100 Ω, the load current will be

 3 A.
 30 mA.
 300 mA.
 100 mA.

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