AC Circuit objective questions (mcq) and answers

1.  The power factor of an AC circuit is equal to


   A. Cosine of the phase angle

   B. Sine of the phase angle

   C. Unity for a resistive circuit

   D. Unity for a reactive circuit


✔ View Answer


A. Cosine of the phase angle

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2.  The power factor of an AC circuit lies between


   A. 0 and 1

   B. -1 and 1

   C. 0 and -1

   D. None of these


✔ View Answer


A. 0 and 1

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3.  A circuit component that oppose the change in the circuit voltage is


   A. Resistance

   B. Capacitance

   C. Inductance

   D. All of the above


✔ View Answer


B. Capacitance

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4.  In a circuit containing R, L and C, power loss can take place in


   A. C only

   B. L only

   C. R only

   D. All of the above


✔ View Answer


C. R only

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5.  In any AC circuit always


   A. Apparent power is more than actual power

   B. Reactive power is more than apparent power

   C. Actual power is more than reactive power

   D. Reactive power is more than actual power


✔ View Answer


A. Apparent of power is more than actual power

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