1. A passive element in a circuit is one which
(a) supplies energy.
(b) received energy.
(c) both supplies and receives energy.
(d) none of the above. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
2. Which of the following statement is true about a linear circuit
(a) parameters changes with change in voltage.
(b) parameters changes with change in current.
(c) parameter do not changes with voltage and current.
(d) none of the above. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
3. The superposition theorem is used when the circuit contains
(a) passive elements only.
(b) active elements only.
(c) a single voltage source.
(d) a number of voltage source. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] D [/accordion-item][/accordion]
4. Which of the following theorem is used for the analysis of a vacuum tube circuit?
(a) Thevenin’s theorem.
(b) Superposition theorem.
(c) Norton’s theorem.
(d) none of the above. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
5. Which of the following is a neutral magnet?
(a) steel.
(b) lomestone.
(c) soft iron.
(d) magnesia. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
6. At which point of a magnet, the intensity of magnetic lines of force is maximum?
(a) south pole.
(b) north pole.
(c) magnetic pole.
(d) unit pole. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
7. The ability of a material to conduct magnetic flux through it is known as
(a) permeability.
(b) conductivity.
(c) permittivity.
(d) reluctivity. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
8. The current of electric circuit is analogous to which of the magnetic circuit?
(a) flux density.
(b) mmf.
(c) flux.
(d) magnetic intensity. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
9. At series resonance, the voltage across capacitor or inductor is
(a)zero.
(b) equal to supply voltage.
(c) quality factor times the supply voltage.
(d) power factor times the supply voltage. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
10. The curve between frequency and current is known as
(a) voltage curve.
(b) power curve.
(c) resonance curve.
(d) load curve. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
11. Which of the following circuit element stores energy in the electromagnetic field ?
(a) Inductance.
(b) Condenser.
(c) Variable resistor.
(d) Resistance. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
12. The principle of dynamically induced emf is utilised in a
(a) choke.
(b) transformer.
(c) generator.
(d) thermo-couple. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
13. A crack in the magnetic path of an inductor will result in
(a) unchanged inductance.
(b) increased inductance.
(c) zero inductance.
(d) reduced inductance. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] D [/accordion-item][/accordion]
14. The principle of statically induced emf is utilised in a
(a) motor.
(b) transformer.
(c) generator.
(d) battery. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
15. Power factor of an inductive circuit is generally improved by connecting a capacitor in
(a)parallel.
(b) series.
(c) either parallel or series.
(d) none of the above. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]