Electrostatics

41. The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as

Photoelectric effect
Chemical effect
Magnetic effect
Induction

Detailed SolutionThe phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as

42. Which of the following capacitors is marked for polarity ?

Air
Paper
Mica
Electrolytic

Detailed SolutionWhich of the following capacitors is marked for polarity ?

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

0.024 F
0.12 F
0.6 F
0.8 F

Detailed SolutionA capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

44. The relative permittivity has the following units

F/m
m/F
Wb/m
no units

Detailed SolutionThe relative permittivity has the following units

45. An electric field line and an equipotential surface are

Always parallel
Always at 90°
Inclined at any angle
None of the above

Detailed SolutionAn electric field line and an equipotential surface are

46. Which of the following is not a vector ?

Linear momentum
Angular momentum
Electric field
Electric potential

Detailed SolutionWhich of the following is not a vector ?

47. Electric displacement is a______quantity.

scalar
vector
both of the above
none of the above

Detailed SolutionElectric displacement is a______quantity.

48. Electric field intensity is a quantity

scalar
vector
both (A) and (B)
none of the above

Detailed SolutionElectric field intensity is a quantity

49. capacitors can be used only for D.C.

Air
Paper
A. Air B. Paper C. Mica
Electrolytic

Detailed Solutioncapacitors can be used only for D.C.

50. capacitors are mainly used for radio frequency tuning.

Paper
Air
Mica
Electrolytic

Detailed Solutioncapacitors are mainly used for radio frequency tuning.

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