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Electrostatic and Capacitance

Electrostatic and Capacitance
At a point is equal to the negative potential gradient at that point.

Electric intensity
Magnetic flux density
Electric flux
Magnetic flux

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Electrostatic and Capacitance
An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is

0 V
2 V
6 V
3 V

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Electrostatic and Capacitance
One volt is the same as

one joule/coulomb
one coulomb/joule
one coulomb
one joule

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Electrostatic and Capacitance
The breakdown voltage for paper capacitors is usually

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

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Electrostatic and Capacitance
Which of the following material has least value of dielectric constant ?

Ceramic
Paper
Mica
Oil

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Electrostatic and Capacitance
Capacitors are mainly used for radio frequency tuning.

Paper
Air
Mica
Electrolytic

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