One volt is the same as
A. one joule/coulomb
B. one coulomb/joule
C. one coulomb
D. one joule
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_______ field is associated with the capacitor.
A. Electric
B. Magnetic
C. Both (A) and (B)
D. None of the above
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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
A. milli-coulomb
B. micro-coulomb
C. pico-coulomb
D. coulomb
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A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is
A. 0.024 F
B. 0.12 F
C. 0.6 F
D. 0.8 F
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In a capacitive circuit
A. a steady value of applied voltage causes discharge
B. an increase in applied voltage makes a capacitor charge
C. decrease in applied voltage makes a capacitor charge
D. none of the above
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Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is
A. 0.56 x 1015 m/s2
B. 1.5 x 1015 m/s2
C. 1.6 x 1015 m/s2
D. 1.76 x 1015 m/s2
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What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
A. 50 pF
B. 100 pF
C. 150 pF
D. 200 pF
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A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
A. Paper capacitor
B. Ceramic capacitor
C. Electrolytic capacitor
D. Any-of the above
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Air capacitors are generally available in the range
A. 10 to 400 pF
B. 1 to 20 pF
C. 100 to 900 pF
D. 20 to 100 pF
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An electrolytic capacitor is generally made to provide
A. low capacitance
B. fixed capacitance
C. variable capacitance
D. large value of capacitance
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The inverse of capacitance is called
A. reluctance
B. conductance
C. susceptance
D. elastance
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A capacitor consists of
A. two insulators separated by a conductor
B. two conductors separated by an insulator
C. two insulators only
D. two conductors only
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The breakdown voltage for paper capacitors is usually
A. 20 to 60 volts
B. 200 to 1600 volts
C. 2000 to 3000 volts
D. more than 10000 volts
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Which of the following capacitors is marked for polarity ?
A. Air
B. Paper
C. Mica
D. Electrolytic
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Which of the following capacitors can be used for temperature compensation ?
A. Air capacitor
B. Ceramic capacitor
C. Paper capacitor
D. None of the above
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To prevent the generation of static charges on rubber or flat leather
A. surface is moistened
B. conductive dressing is done
C. oil compound dressing is done
D. talcum powder is sprayed on the surface
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A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be
A. 5 times smaller than before
B. 5 times greater than before
C. 10 times greater than before
D. 25 times larger than before
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A condenser suitable for D.C. only is
A. Metallic plate variable gang condenser
B. Metallic paper capacitor
C. Oil impregnated paper condenser
D. Poled aluminium electrolytic condenser
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The dissipation factor of a good dielectric is of the order of
A. 0.0002
B. 0.002
C. 0.02
D. 0.2
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Dielectric strength of medium
A. increases with rise in temperature
B. increases with moisture content
C. is same for all insulating materials
D. none of the above
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