1. If one of the resistors in a parallel circuit is removed, the total resistance
(a) decreases.
(b) increases.
(c) remains the same.
(d) doubles.
Answer
2. When number of capacitors are connected in series, then the equivalent capacitance is
(a) increases.
(b) decreases.
(c) remain same.
(d) none of the above.
Answer
3. When number of inductors are connected in series, then equivalent inductance is
(a) decreasing.
(b) increases.
(c) remain same.
(d) none of the above.
Answer
4. An inductor is a device which store energy in the form of
(a) electric field.
(b) magnetic field.
(c) both electric and magnetic field.
(d) voltage and current.
Answer
5. A capacitor is a device designed to store energy in the
(a) electric field.
(b) magnetic field.
(c) both electric and magnetic field.
(d) plates.
Answer
6. The conductivity of superconductor is
(a) infinite.
(b) very large.
(c) very small.
(d) zero.
Answer
7. The fuse wire is made of
(a) copper.
(b) nichrome.
(c) lead tin alloy.
(d) aluminium.
Answer
8. The temperature co-efficient of resistance of semiconductor is
(a) negative.
(b) zero.
(c) positive.
(d) none of these.
Answer
9. An electric filament bulb can be worked from
(a) D.C. supply only.
(b) A.C. supply only.
(c) Battery supply only.
(d) All of the above.
Answer
10. The fuse wire is always rated in term of
(a) ampere-hours.
(b) ampere-volts.
(c) kWh.
(d) amperes.
Answer
11. The filament of an electric bulb is made of
(a) nichrom.
(b) aluminium.
(c) tungsten.
(d) nickel.
Answer
12. Capacitors for P.f correction are rated in
(a) KW.
(b) KVA.
(c) KV.
(d) KVAR.
Answer
13. A 4 ohm resistor having 3 A current will dissipate the power of
(a) 36 watts.
(b) 10 watts.
(c) 12 watts.
(d) 15 watts.
Answer
14. The power factor of an inductive load is always
(a) positive.
(b) zero.
(c) negative.
(d) unity.
Answer
15. No current flows between two charged bodies if they have same
(d) charge.
(b) capacity.
(c) potential.
(d) resitance.
Answer