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Electrostatic and Capacitance

Electrostatic and Capacitance
Which of the following capacitors has relatively shorter shelf life ?

Electrolytic
Paper
Mica
Ceramic

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Electrostatic and Capacitance
The capacitance of a capacitor is not affected by

Thickness of plates
All of the listed here
Distance between plates
Area of plates

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Electrostatic and Capacitance
The breakdown voltage for paper capacitors is usually

2000 to 3000 volts
more than 10000 volts
20 to 60 volts
200 to 1600 volts

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Electrostatic and Capacitance
What is the capacitance when Q = 60 µC and V = 12 V?

12 µF
50 µF
5 µF
720 µF

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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
Dielectric strength of medium

Is same for all insulating materials
Increases with rise in temperature
Increases with moisture content
None of the listed here

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