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Electrostatic and Capacitance

Electrostatic and Capacitance
The true power in a capacitor is zero.

1

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Electrostatic and Capacitance
To prevent the generation of static charges on rubber or flat leather

Conductive dressing is done
Oil compound dressing is done
Talcum powder is sprayed on the surface
Surface is moistened

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Electrostatic and Capacitance
The units of volume charge density are

Coulomb/meter
Coulomb/meter
Coulomb/meter
Coulomb/meter

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Electrostatic and Capacitance
Which of the following capacitors will have the least variation?

Ceramic capacitor
Silver plate mica capacitor
Paper capacitor
None of the listed here

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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

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

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Electrostatic and Capacitance
For making a capacitor, it is better to select a dielectric having

Permittivity slightly more than that of air
High permeability
Low permeability
Permittivity same as that of air

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