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Electric Circuits

Electric Circuits
For symmetrical wave form average value of one full cycle is

 1.11
 0
 2.22
 1

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Electric Circuits
A reactance having an inductor of 0.15 H is connected in series with 10 Ω resistance. What will be the inductive reactance?

 47.1 Ω.
 1.5 Ω.
 48.15 Ω.
 None of these.

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Electric Circuits
Instantaneous power in inductor is proportional to the

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

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Electric Circuits
In which braking back emf exceeds supply voltage?

  Regenerative.
  Dynamic.
  Plugging.
  None of these.

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Electric Circuits
Internal heating of a capacitor is usually attributed to

 leakage resistance.
 electron movement.
 plate vibration.
 dielectric charge.

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Electric Circuits
The Laplace Transform of a shifted unit step f (t) = U (t-a) is

 s(1-e-as).
 (e-as)/s.
 se-as.
 e-as.

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