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Electrostatic and Capacitance

Electrostatic and Capacitance
Which is the most superior dielectric out of the following ?

Bakelite
Paper
Glass
Air

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Electrostatic and Capacitance
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?

Its molecular structure will get changed
It will get punctured or cracked
It will become magnetic
It will melt

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Electrostatic and Capacitance
The dissipation factor of a good dielectric is of the order of

0.002
2.0
0.0002
0.2

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Electrostatic and Capacitance
A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is

200 joules
250 joules
50 joules
150 joules

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Electrostatic and Capacitance
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be

36 x 109 N
36 x 108 N
36 x 10 fa
36 x 107 N

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Electrostatic and Capacitance
Paper condenser is

None of the listed here
Electrolytic condenser
Usually of fixed value
Always polarised

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