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Electrostatic and Capacitance

Electrostatic and Capacitance
When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of

2 joules
6 joules
4 joules
8 joules

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Electrostatic and Capacitance
When the plate area of a capacitor increases,

The capacitance is unaffected
The voltage it can withstand increases
The capacitance increases
The capacitance decreases

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Electrostatic and Capacitance
Which of the following capacitors is marked for polarity ?

Mica
Electrolytic
Air
Paper

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Electrostatic and Capacitance
The sparking between two electrical contacts can be reduced by inserting a

resistance in line
capacitor in parallel with contacts
capacitor in series with each contact
None of these

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Electrostatic and Capacitance
Five time constants are required for a capacitor to charge fully or discharge fully.

1

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Electrostatic and Capacitance
When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

Remains same
Decrease
None of the listed here
Increase

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