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Electric Circuits

Electric Circuits
What is the SI unit of electric current ?

None of these
 Ohm.
 Faraday.
 Ampere.

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Electric Circuits
A current of 4 A flows in an ac circuit when 100 V dc is applied to it whereas it takes 250 v ac to produce the same current the power factor of the circuit is

 10.
 0.85.
 0.4.
 1.

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Electric Circuits
Dependent source of current and voltage are those which have

 unidirectional characteristic.
 output dependent on input.
 independent of any other network variable.
All of these

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Electric Circuits
Ceq of two capacitors connected in series is given by

 C1 C2 / (C1 + C2).
 C1 + C2.
 C1 = C2.
 C1C2.

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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
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The voltage drop across R is

 40.8 V.
  30.6 V.
 24.4 V .
  50.8 V.

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MORE MCQ ON Electric Circuits

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