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Electric Circuits

Electric Circuits
Which of the followings is the expression for energy stored in a capacitor?

 C / v.
 C dv / dt.
 Cv.
 (1 / 2) Cv2.

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Electric Circuits
An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are

 50 Ω and 200 Ω.
 40 Ω and 200 Ω.
 40 Ω and 40 Ω.
 25 Ω and 5 Ω.

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Electric Circuits
Instantaneous power in inductor is proportional to the

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

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Electric Circuits
Advantage of active filter is

  both of above.
  do not offer gain.
  easy to tune.
  derive high impedance load.

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Electric Circuits
Which law(s) find application in electrolysis?

 Coulombs law.
 Faradays law.
 Ohms law.
 Gausss law.

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Electric Circuits
The electron is lighter than a proton by a factor of about

 184.
 18400.
 18.4.
 1840.

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MORE MCQ ON Electric Circuits

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