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Electrostatic and Capacitance

Electrostatic and Capacitance
Permittivity is expressed in

Weber/sq-m
Farad/meter
Farad/sq-m
Weber/meter

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Electrostatic and Capacitance
XC is inversely proportional to frequency and capacitance.

1

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Electrostatic and Capacitance
Which of the following capacitor is preferred in case of single phase motor ?

Paper
Mica
Air
Electrolytic

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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

45
42
54
37

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Electrostatic and Capacitance
Dielectric strength of medium

None of the listed here
Increases with moisture content
Is same for all insulating materials
Increases with rise in temperature

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Electrostatic and Capacitance
The value of dielectric constant for vacuum is taken as

1
3
2
0

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