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Electrostatic and Capacitance

Electrostatic and Capacitance
An electrolytic capacitor is generally made to provide

Low capacitance
Fixed capacitance
Variable capacitance
Large value of capacitance

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Electrostatic and Capacitance
Capacitors can be used only for D.C.

Paper
Air
Mica
Electrolytic

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Electrostatic and Capacitance
The lines of force due to charged particles are

sometimes curved
None of these
always curved
always straight

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Electrostatic and Capacitance
Electric intensity at any point in an electric field is equal to the at that point.

potential gradient
magnetic flux density
None of these
electric flux

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

Disc
Tubes
None of the listed here
Rolled Foil

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Electrostatic and Capacitance
A 4.7 MΩ resistor is in series with a 0.015 µF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?

352 ms
3.5 ms
35 ms
70.5 ms

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