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Electric Circuits

Electric Circuits
Current efficiency in electroplating is usually

  99 %.
  50 to 60 %.
  90 to 98 %.
  70 to 80 %.

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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
Which quantity consists of a unit 1KWh ?

 Power
 Energy
 Charge
 Time

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Electric Circuits
The resistance of 200 W, 200 V lamp is

 100 Ω.
 800 Ω.
  200 Ω.
 400 Ω.

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Electric Circuits
The maximum power that can be transferred to the load resistor R from the voltage source in the figure is

 9/8 W.
 6/8W.
 7.5 W.
 1 W.

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Electric Circuits
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be

 25 µF
 10 µF
 5 µF
 1 µF

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