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Electrostatic and Capacitance

Electrostatic and Capacitance
The dissipation factor of a good dielectric is of the order of

0.0002
2.0
0.002
0.2

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Electrostatic and Capacitance
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will

not be in equilibrium
remain in stable equilibrium
move out of the field of influence of the two charges
be in unstable equilibrium

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

36 x 10 fa
36 x 107 N
36 x 108 N
36 x 109 N

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Electrostatic and Capacitance
Which of the following capacitors will have the least value of breakdown voltage ?

Electrolytic
Air
Paper
Mica

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Electrostatic and Capacitance
Mica capacitors are characterised by all of the following except

accurate value
low losses
stable operation
low leakage reactance

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Electrostatic and Capacitance
The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value

54
37
42
45

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