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Electrostatic and Capacitance

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

2
1
3
0

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Electrostatic and Capacitance
A condenser suitable for D.C. only is

Metallic paper capacitor
Metallic plate variable gang condenser
Oil impregnated paper condenser
Poled aluminium electrolytic condenser

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Electrostatic and Capacitance
Electric intensity at any point in an electric field is equal to the at that point.

potential gradient
magnetic flux density
electric flux
None of these

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Electrostatic and Capacitance
Which of the following materials has the highest value of dielectric constant?

Glass
Mica
Ceramic
Paper

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Electrostatic and Capacitance
Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?

150 times
100 times
50 times
300 times

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Electrostatic and Capacitance
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is

24 µs
2.42 µs
480 µs
48 µs

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