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