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Electric Circuits

Electric Circuits
Conductance of any conductor is expressed as

  mho.
  volt2 / watt.
  ampere / watt.
  watt / ampere2.

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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?

 1.
 0.866.
 0.577.
 0.5.

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Electric Circuits
The inductive reactance of an electric circuit is 200 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 200 Ohms.
 100 Ohms.
 400 Ohms.
 50 Ohms.

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Electric Circuits
Which of the following are typical resistance and power-dissipation values for a carbon-composition resistor?

 10000 ohms, 10 W.
 10 ohm, 50 W.
 5000 ohms, 100W.
 1000000 ohms, 1 W.

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Electric Circuits
The value of E within the field due to a point charge can be found with help of

 Faradays law.
 Lenzs law.
 Coulombs law.
 Kirchhoffs law.

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Electric Circuits
Instantaneous power in inductor is proportional to the

 temperature of the inductor.
 square of the rate of change of current.
 product of the instantaneous current and rate of change of current.
 square of instantaneous current.

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MORE MCQ ON Electric Circuits

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