# MCQs on Electrical Circuit Theory

1. Which of the following theorem is used for the analysis of a transistor circuit
(a) Thevenin’s theorem.
(b) Superposition theorem.
(c) Norton’s theorem.
(d) Reciprocity.

2. The most elementary form of a loop which cannot be further divided into other loops is called
(a) node.
(b) branch.
(c) loop.
(d) mesh.

3. An element which supplies electric energy to the circuit is called
(a) active element.
(b) passive element.
(c) bilateral element.
(d) source element.

4. In a series R-L-C circuit at resonance
(a) imepedance is maximum.
(b) admittance is maximum.
(c) impedance is purely reactive.
(d) current is minimum.

5. Series resonant circuit is sometimes known as
(a) rejector circuit.
(b) acceptor circuit.
(c) inductive circuit.
(d) capacitive circuit.

6. Parallel resonant circuit is sometimes known as
(a) rejector circuit.
(b) acceptor circuit.
(c) inductive circuit.
(d) capacitive circuit.

7. A term used to express the amount of electric energy stored in electrostatic field is
(a) joules.
(b) watts.
(c) electron-volts.
(d) coulombs.

8. A series-resonant circuit implies
(a) zero pf and maximum current.
(b) unity pf and maximum current.
(c) zero pf and minimum current.
(d) unity pf and minimum current.

9. The quality factor of R-L-C circuit will increase if
(a) R decreases.
(b) R increases.
(c) voltage increases.
(d) current decrease.

10. The internal conductance of ideal voltage source is
(a) infinite.
(b) zero.
(c) equal to internal resistance.
(d) equal to external collector.

11. Voltage resonance means
(a) series resonance.
(b) parallel resonance.
(c) series parallel resonance.
(d) none of these.

12. At parallel resonance, the current flowing through L and C are
(a) infinite.
(b) zero.
(c) equal.
(d) unequal.

13. Capacitor opposes change in
(a) current.
(b) voltage.
(c) voltage and current.
(d) neither voltage or current.

14. Inductor opposes change in
(a) current.
(b) voltage.
(c) voltage and current.
(d) neither voltage or current.

15. An ideal voltage source has
(a) infinite internal resistance.
(b) zero internal resistance.
(c) infinite current.
(d) zero current.

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