electrostatics MCQs – Page 5

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

electrostatics Mcqs

81. Air capacitors are generally available in the range_________?
0

A. 100 to 900 pF

B. 20 to 100 pF

C. 1 to 20 pF

D. 10 to 400 pF

82. The inverse of capacitance is called_______________?
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A. conductance

B. reluctance

C. elastance

D. susceptance

83. The ohmmeter reading for a short circuited capacitor is____________?
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A. few megohms

B. zero

C. infinity

D. few kilo ohms

84. An electrolytic capacitor is generally made to provide__________?
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A. variable capacitance

B. low capacitance

C. fixed capacitance

D. large value of capacitance

85. capacitors can be used only for D.C ?
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A. Electrolytic

B. Paper

C. Mica

D. Air

86. Electric field intensity is a quantity_____________?
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A. scalar

B. vector

C. both A. and (6)

D. none of the above

87. Which of the following capacitors has relatively shorter shelf life____________?
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A. Ceramic capacitor

B. Electrolytic capacitor

C. Paper capacitor

D. Mica capacitor

88. at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point ?
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A. None of the above

B. Magnetic flux density

C. Electric intensity

D. Electric flux

89. In order to remove static electricity from machinery___________?
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A. ground the framework

B. construct insulated cabins

C. insulate the machinery

D. humidify the surroundings

90. When a dielectric is placed in an electric field the field strength____________?
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A. reduces to zero

B. increases

C. decreases

D. remain unchanged

A. 9.2 x 104N

B. 9 x 107N

C. 9 x 109N

D. 9 x 109N

92. The number of Faraday tubes of flux passing through a surface in an electric field is called____________?
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A. electric charge density

B. electric flux density

C. electric flux

D. magnetic flux density

93. In a capacitor the electric charge is stored in____________?
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A. metal plates

B. dielectric

C. both (A) and (B)

D. none of the above

94. The direction of electric field due +0 positive charge is ___________?
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A. away from the charge

B. towards the charge

C. both A. and (6)

D. none of the above

95. A capacitor consists of_____________?
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A. two conductors only

B. two conductors separated by an insulator

C. two insulators only

D. two insulators separated by a conductor

96. Which is the most superior dielectric out of the following ?
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A. Glass

B. Bakelite

C. Paper

D. Air

97. Potential difference is the work done in moving unit positive charge form one point to another________________?
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A. in the direction of electric intensity

B. against electric intensity

C. in the direction of electric flux

D. in any direction

98. Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?
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A. 50

B. 200

C. 100

D. 150

99. Capacitance increases with_____________?
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A. increase in plate area and decrease in distance between the plates

B. decrease in plate area and value of applied voltage

C. reduction in plate area and distance between the plates

D. increase in plate area and distance between the plates

100. Electric flux linked with a surface will be maximum when____________?
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A. The surface is held parallel to the electric field

B. The surface is held perpendicular to the electric field

C. The surface makes an angle of 45with the field

D. All of the above

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