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Electric Circuits

Electric Circuits
Galvanizing is the coating of

 chromium.
 brass.
 zinc.
 lead.

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Electric Circuits
Which quantity consists of a unit 1KWh ?

 Power
 Charge
 Energy
 Time

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Electric Circuits
Kirchhoffs laws are valid for

  non-linear circuits only.
  linear circuit only.
  both linear and non-linear circuits.
  passive time invariant circuits.

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Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 0.5.
 1.
 0.577.
 0.866.

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Electric Circuits
If conductance increases as temperature increases it is called as ..........

 positive co-efficient.
 both 1 and 2.
None of these
 negative co-efficient.

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Electric Circuits
A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest?

 100 Hz.
 1 Hz.
 1000 Hz.
 10 Hz.

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MORE MCQ ON Electric Circuits

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