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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Regenerative.
  None of these.
  Dynamic.
  Plugging.

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Electric Circuits
In the circuit shown in the figure, the value of Vs is 0, when I = 4 A. The value of I, when Vs = 16 V, is

 12 A.
 10 A.
 8 A.
 6 A.

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Electric Circuits
What is apparent power in AC operation?

 Product of voltage and current.
 Product of voltage and current at full load.
 Product of voltage and current at no load.
 Product of rms voltage and rms current.

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Electric Circuits
A external resistance R is connected to a cell of internal resistance r, then the current is maximum when

None of these
 R > r.
 R = r.
 R < r.

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Electric Circuits
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF. Find the time constant of the circuit?

 2 msec
 1 μsec
 4 msec
 2 μsec

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Electric Circuits
What would be the power given by source V2?

 10 W.
 0 W.
 - 5 W.
 5 W.

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MORE MCQ ON Electric Circuits

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