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Electrostatic and Capacitance

Electrostatic and Capacitance
For closer tolerances which of the following capacitors is usually preferred ?

Paper capacitor
Mica capacitor
None of these
Ceramic disc capacitor

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Electrostatic and Capacitance
A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

5 times greater than before
5 times smaller than before
10 times greater than before
25 times larger than before

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Electrostatic and Capacitance
Which capacitor will be physically smaller for the same ratings ?

Ceramic capacitor
Both will be of equal size
Paper capacitor
None of these

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Electrostatic and Capacitance
The unit of capacitance is

Hennry
Farady
Ohm
Farady/m

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

1

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Electrostatic and Capacitance
A dielectric material must be

Resistor
Insulator
Semi conductor
Good conductor

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