1. An electric current is the
(A) flow of electrons.
(B) opposition to electrons.
(C) storage of charge.
(D) ionization of atom.
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2. Electric pressure is also called
(A) resistance.
(B) power.
(C) voltage.
(D) energy.
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3. Which of the following is best conductor of electricity?
(A) aluminum.
(B) silver.
(C) copper.
(D) gold.
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4. The dielectric material used in variable capacitor is generally
(A) mica.
(B) air.
(C) ceramic.
(D) electrolyte.
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5. What does a capacitor store?
(A) Current.
(B) Charge.
(C) Voltage.
(D) Power.
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6. Power consumed in a pure inductive circuit is
(A) zero.
(B) less.
(C) high.
(D) infinity.
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7. A capacitor block
(A) DC.
(B) AC.
(C) both AC or DC.
(D) none of the above.
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8. An inductor blocks
(A) AC.
(B) DC.
(C) both AC or DC.
(D) none of the above.
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9. Frequency of direct current is
(A) zero.
(B) unity.
(C) 50 Hz.
(D) infinity.
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10. Power factor of direct current is
(A) zero.
(B) lagging.
(C) unity.
(D) leading.
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11. The number of cycle per second is called
(A) frequency.
(B) time period.
(C) angular displacement.
(D) angular velocity.
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12. An instrument which detects electric current is known as
(A) induction meter.
(B) watt meter.
(C) galvanometer.
(D) none of these.
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13. The substances which have a large number of free electrons and offer a low resistance are called
(A) insulators.
(B) inductors.
(C) conductors.
(D) semi-conductors.
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14. The property of a conductor due to which it passes current is called
(A) reluctance.
(B) conductance.
(C) admittance.
(D) inductance.
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15. Reciprocal of the conductance is called
(A) admittance.
(B) resistance.
(C) reluctance.
(D) reactance.
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