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Electrostatic and Capacitance

Electrostatic and Capacitance
The total deficiency or excess of electrons in a body is known as

Voltage
Potential gradient
Current
Charge

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Electrostatic and Capacitance
When the voltage across a capacitor is tripled, the stored charge

Is cut to one-third
Triples
Stays the same
Doubles

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Electrostatic and Capacitance
The dielectric constant is the ability of a material to establish an electric field.

1

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Electrostatic and Capacitance
Dielectric strength of medium

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

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Electrostatic and Capacitance
A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is

100 KV/m
30 KV/m
50 KV/m
10 KV/m

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Electrostatic and Capacitance
The dielectric constant (relative permittivity) of glass is given by

5 to 100
0.5 to 1.0
0.1 to 0.4
2.0 to 4.0

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