Electrostatic

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

1. proportional to d
2. inversely proportional to d
3. inversely proportional to d
4. none of the above

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

1. 400 N/C
2. 600 N/C
3. 800 N/C
4. 1200 N/C

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83. The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be

1. 36 x 10fa
2. 36 x 107 N
3. 36 x 108 N
4. 36 x 109 N

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

1. 60 N
2. 30 N
3. 40 N
4. 15 N

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85. The inverse of capacitance is called

1. reluctance
2. conductance
3. susceptance
4. elastance

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86. The lines of force due to charged particles are

1. always straight
2. always curved
3. sometimes curved
4. none of the above

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

1. insulation
2. conductor
3. outer sheath
4. uniformly all over

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88. The number of Faraday tubes of flux passing through a surface in an electric field is called

1. electric flux
2. electric flux density
3. magnetic flux density
4. electric charge density

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89. The ohmmeter reading for a short circuited capacitor is

1. infinity
2. few kilo ohms
3. few megohms
4. zero

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

1. pholoelectric effect
2. chemical effect
3. magnetic effect
4. induction

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