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electrostatics MCQs

Practise focused electrostatics questions with marked answers for exam preparation and subject revision.

electrostatics Mcqs

1. A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________?
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A. 1000J

B. 200J

C. 100 eV

D. 100J

2. Which one of the following can be taken as the measure of electric intensity ?
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A. VF/A

B. F/A

C. q/VA

D. V/A

3. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________?
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A. 200 joules

B. 150 joules

C. 250 joules

D. 50 joules

4. The lines of force due to charged particles are_________?
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A. sometimes curved

B. always curved

C. always straight

D. none of the above

5. The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be____________?
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A. 36 x 108 N

B. 36 x 107 N

C. 36 x 10fa

D. 36 x 109 N

6. A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________?
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A. 100 nF

B. 10 F

C. 10 uF

D. 1000 uF

7. A condenser suitable for D.C. only is________?
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A. poled aluminium electrolytic condenser

B. metallic plate variable gang condenser

C. oil impregrated paper condenser

D. metallic paper capacitor

8. If three 10 uF capacitors are connected in parallel, the net cararitance is___________?
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A. 50 uF

B. 40 uF

C. 20 uF

D. 30 uE

9. Which of the following statements is incorrect _________________?
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A. A wire cable has distributed capacitance between the conductors

B. The stored energy in a capacitor increases with applied voltage

C. The leakage resistance of ceramic capacitors is generally high

D. The stored energy in a capacitor decreases with reduction in value of capacitance

10. The electric field at a point situated at a distance d from straight charged conductor is____________?
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A. inversely proportional to d

B. proportional to d

C. none of the above

D. inversely proportional to d

11. The relative permittivity has the following units__________?
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A. Wb/m

B. F/m

C. no units

D. m/F

12. A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?
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A. Ceramic capacitor

B. Mica capacitor

C. Both will have identical value of capacitance

D. It depends on applied voltage

13. Which of the following expression is correct for electric field strength___________?
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A. E = D/E

B. E= nD2

C. E = jtD

D. E = D2/t

14. Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as_____________?
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A. milli-coulomb

B. coulomb

C. pico-coulomb

D. micro-coulomb

15. The relative permittivity of free space is given by__________?
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A. 10

B. 1000

C. 100

D. 1

16. ____________field is associated with the capacitor?
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A. Electric

B. Magnetic

C. Both (A) and (B)

D. None of the above

17. The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire_______________?
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A. charge will flow from A to B

B. charge will flow from B to A

C. no flow of charge will occur

D. both a and b are possible

18. The total deficiency or excess of electrons in a body is known as____________?
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A. voltage

B. potential gradient

C. charge

D. current

19. Paper capacitors usually have a tolerance of___________?
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A. 5%

B. 20%

C. 15%

D. 10%

20. Permittivity is expressed in_____________?
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A. Weber/meter

B. Farad/sq-m

C. Farad/meter

D. Weber/sq-m

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