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ELECTRIC CIRCUITS

Electric Circuits
A capacitor is charged by a constant 10 mA current sources which is turned on for 1 second. Assuming the capacitor is initially charge free; determine the charge delivered to and the power supplied by the source if the capacitor has a value of 1 mF.

 0.01C, 10MW.
 0.1C, 100MW.
 0.01C and 5W.
 0.1C, 10MW.

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Electric Circuits
If the practical units of voltage and current wave each made 20 times as large as they are at present, what would be the consequent alternation in the size of the unit of capacitance?

 200 times.
 20 times.
 Nil.
 60 times.

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Electric Circuits
In which braking back emf exceeds supply voltage?

  Regenerative.
  Plugging.
  Dynamic.
  None of these.

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Electric Circuits
Third pin of a 3 pin plug is thicker and longer

 all pins are of same size.
 none of these.
 for designing purpose.
 for protection purpose.

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Electric Circuits
What is the reactive power in AC operation?

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

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