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Electric Circuits

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

 0.577.
 0.866.
 0.5.
 1.

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Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 75.
 60.
 105.
 15.

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Electric Circuits
Which of the following is not a bilateral element?

 Capacitor.
 Resistor.
 Inductor.
 Diode.

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Electric Circuits
Which of the following is applicable for both linear and non-linear circuits?

 Superposition theorem.
 None of these .
 Thevnin’s theorem.
 Norton’s theorem.

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Electric Circuits
Electric flux is proportional to

 potential difference between electrodes.
 resistivity of medium.
 rate of change of potential difference.
 rate of change of current.

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Electric Circuits
Highest current density is usually recommended for

  cadmium plating.
  chromium plating.
  tin plating.
  bronze plating.

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MORE MCQ ON Electric Circuits

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