Electrostatics Archives - Page 6 of 11 - MCQ and Quiz for Exams

51. The units of volume charge density are

Coulomb/meter

Coulomb/meter2

Coulomb/meter3

Coulomb/meter4

Detailed SolutionThe units of volume charge density are

52. capacitors are used for audio frequency and radio frequency coupling and tuning.

Air

Mica

Plastic film

Ceramic

Detailed Solutioncapacitors are used for audio frequency and radio frequency coupling and tuning.

53. A capacitor consists of two

Ceramic plates and one mica disc

Insulators separated by a dielectric

Silver-coated insulators

Conductors separated by an insulator

Detailed SolutionA capacitor consists of two

54. at a point is equal to the negative potential gradient at that point.

Electric intensity

Electric flux

Magnetic flux

Magnetic flux density

Detailed Solutionat a point is equal to the negative potential gradient at that point.

55. A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 103 N, is known as

milli-coulomb

micro-coulomb

pico-coulomb

coulomb

Detailed SolutionA charge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 103 N, is known as

56. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is

50 joules

150 joules

200 joules

250 joules

Detailed SolutionA capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is

57. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is

100 kV/m

10 kV/m

5 kV/m

2 kV/m

Detailed SolutionA potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is

58. The minimum value of potential gradient in a cable occurs in

insulation

conductor

outer sheath

uniformly all over

Detailed SolutionThe minimum value of potential gradient in a cable occurs in

59. The breakdown voltage for paper capacitors is usually

20 to 60 volts

200 to 1600 volts

2000 to 3000 volts

more than 10000 volts

Detailed SolutionThe breakdown voltage for paper capacitors is usually

60. A paper capacitor is usually available in the form of

tubes

rolled foil

disc

meshed plates

Detailed SolutionA paper capacitor is usually available in the form of

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