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Electrostatic and Capacitance

Electrostatic and Capacitance
A paper capacitor is usually available in the form of

Tubes
Rolled Foil
Disc
None of the listed here

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Electrostatic and Capacitance
Of the following capacitors, which one has the highest dielectric constant?

Mica
Paper
Air
Glass

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Electrostatic and Capacitance
A capacitor consists of two

None of the listed here
Insulators separated by a dielectric
Ceramic plates and one mica disc
Conductors separated by an insulator

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Electrostatic and Capacitance
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

Charge on the capacitor decreases
Charge on the capacitor increases
Voltage across the plates increases
Voltage across the plates decreases

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Electrostatic and Capacitance
Which medium has the least dielectric strength ?

Water
Glass
Paraffin wax
Air

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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

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

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