MCQ's On Static Electricity|Objective Questions Electric Field

Contents

1. The unit of absolute permittivity of a medium is

(a) joule/coulomb

(b) newton-metre

(d) farad/coulomb

2. If relative permittivity of mica is 5, its absolute permittivity is

(a) 5 ε0 (b) 5/ε0

3. Two similar electric charges of 1 C each are placed 1 m apart in air. Force of repulsion between them would be nearly…… newton

(a) 1

(b) 9 × 109

(d) 8.854 × 10−12

4. Electric flux emanating from an electric charge of + Q coulomb is

(a) Q/ε0 (b) Q/εr

5. The unit of electric intensity is

(a) joule/coulomb

(b) newton/coulomb

(d) both (b) and (c)

6. If D is the electric flux density, then value of electric intensity in air is

(a) D/ε0 (b) D/ε0εr

7. For any medium, electric flux density D is related to electric intensity E by the equation

(a) D = ε0 E (b) D = ε0εr E

8. Inside a conducting sphere,…remains constant

(a) electric flux

(b) electric intensity

(d) potential

9. The SI unit of electric intensity is

(a) N/m

(b) V/m

(d) either (b) or (c)

10. According to Gauss’s theorem, the surface integral of the normal component of electric flux density D over a closed surface containing charge Q is

(a) Q (b) Q/ε0

11. Which of the following is zero inside a charged conducting sphere ?

(a) potential

(b) electric intensity

(d) both (b) and (c)

12. In practice, earth is chosen as a place of zero electric potential because it

(a) is non-conducting

(b) is easily available

charge every day

(d) has almost constant potential.

ANSWERS

1. c 2. a 3. b 4. d 5. d 6. a

7. b 8. d 9. d 10. a 11. c 12. d

Basic electrical, electrical engineering, Electrical engineering MCQ, Electrical Engineering Quiz

MCQ’s on Static Electricity|Objective Questions Electric field