MCQ’s on Capacitor| Capacitors objective Questions

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1. A capacitor consists of two

(a) insulation separated by a dielectric

(b) conductors separated by an insulator

(c) ceramic plates and one mica disc

(d) silver-coated insulators

2. The capacitance of a capacitor is NOT influenced by

(a) plate thickness

(b) plate area

(c) plate separation

(d) nature of the dielectric

3. A capacitor that stores a charge of 0.5 C at 10 volts has a capacitance of …..farad.

(a) 5 (b) 20

(c) 10 (d) 0.05

4. If dielectric slab of thickness 5 mm and år = 6 is inserted between the plates of an air capacitor with plate separation of 8 mm, its capacitance is

(a) decreased (b) almost doubled

(c) almost halved (d)unaffected

6. A parallel plate capacitor has an electrode area of 100 mm2, with a spacing of 0.1 mm between the electrodes. The dielectric between the plates is air with a permittivity of 8.85 × 10–12 F/m. The charge on the capacitor is 100 V. the stored energy in the capacitor is

(a) 8.85 pJ (b) 440 pJ

(c) 22.1 nJ (d) 44.3 nJ

Answers

1. b 2. a 3. d 4. b

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