electrostatics MCQs – Page 2

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

electrostatics Mcqs

21. If a charged rod is brought closer to a gas filled balloon then______________?
0

A. Balloon bursts

B. Balloon squeezes

C. Radius decreases

D. Radius increase

22. Equivalent capacitance is greater than individual capacitances in_____________?
0

A. series combination

B. parallel combination

C. both series and parallel combinations

D. none of above

23. The bridge used for the measurement of the value of the capacitance is____________?
0

A. Wiens bridge

B. Hays bridge

C. Schering bridge

D. Wheatstone bridge

24. The presence of an uncharged conductor near a charged one increases the__________?
0

A. all of the above

B. charge of the charged conductor

C. potential of the charged conductor

D. capacity of the charged conductor

25. capacitors are used for audio frequency and radio frequency coupling and tuning ?
0

A. Air

B. Plastic film

C. Ceramic

D. Mica

26. Which of the following capacitor is preferred in case of single phase motor ?
0

A. Mica capacitor

B. Ceramic capacitor

C. Electrolytic capacitor

D. Paper capacitor

27. Mica capacitors are characterized by all of the following except___________?
0

A. accurate value

B. stable operation

C. low losses

D. low leakage reactance

28. For making a capacitor, it is better to select a dielectric having___________?
0

A. permittivity slightly more than that of air

B. low permittivity

C. permittivity same as that of air

D. high permittivity

29. In a charged capacitor the energy resides in________________?
0

A. magnetic hield

B. nuclear field

C. gravitational field

D. electric field

30. The power dissipated in a pure capacitor is______________?
0

A. zero

B. proportional to applied voltage

C. proportional to value of capacitance

D. both (B) and (C) above

31. A capacitor consists of two____________?
0

A. conductors separated by an insulator

B. silver-coated insulators

C. insulators separated by a dielectric

D. ceramic plates and one mica disc

32. Dielectric strength of a material depends on_____________?
0

A. thickness

B. temperature

C. moisture content

D. all of the above

E. none of the above

33. In the case of a lossy capacitor, its series equivalent resistance value will be_______________?
0

A. very small

B. small

C. large

D. zero

34. While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is____________?
0

A. open circuited

B. leaky

C. short-circuited

D. alright

35. Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?
0

A. Ceramic capacitor

B. Mica capacitor

C. Paper capacitor

D. Aluminium foil capacitor

36. Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?
0

A. charge on the capacitor decreases

B. charge on the capacitor increases

C. voltage across the plates decreases

D. Voltage across the plates increases

37. What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it__________ ?
0

A. It will get punctured or cracked

B. It will melt

C. It will become magnetic

D. Its molecular structure will get changed

38. The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as____________?
0

A. chemical effect

B. magnetic effect

C. pholoelectric effect

D. induction

39. The absolute permittivity of free space is given by_____________?
0

A. 8.854 x KT11 F/m

B. 8.854 x 1(T9 F/m)

C. 8.854 x 10?12 F/m

D. 8.854 x 1(T10 F/m)

40. A dielectric material must be____________?
0

A. good conductor

B. semi conductor

C. resistor

D. insulator

Previous Next

Showing 21 to 40 of 183 mcqs