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Electrostatics MCQs type Questions with answer

1. The lines of force due to charged particles are

A. always straight
B. always curved
C. sometimes curved
D. none of the above

2. The electric field intensity at a point situated 4 metres from a point charge is 200N/C. If the distance is reduced to 2 metres, the field intensity will be

A. 400 N/C
B. 600 N/C
C. 800 N/C
D. 1200 N/C

3. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

A. 60 N
B. 30 N
C. 40 N
D. 15 N

4. The electric field at a point situated at a distance d from straight charged conductor is

A. proportional to d
B. inversely proportional to d
C. inversely proportional to d
D. none of the above

5. The direction of electric field due +0 positive charge is .

A. away from the charge
B. towards the charge
C. both (a) and (6)
D. none of the above

6. A field line and an equipotential surface are

A. always parallel
B. always at 90°
C. inclined at any angle 0
D. none of the above

7. The ability of charged bodies to exert force on 6ne another is attributed to the existence of

A. electrons
B. protons
C. neutrons
D. electric field

8. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will

A. decrease
B. increase
C. remains unchanged
D. become zero

9. A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

A. 0.024 F
B. 0.12 F
C. 0.6 F
D. 0.8 F

10. For making a capacitor, it is better to select a dielectric having

A. low permittivity
B. high permittivity
C. permittivity same as that of air
D. permittivity slightly more than that of air