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Electrostatic and Capacitance

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?

3.5 ms
70.5 ms
352 ms
35 ms

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Electrostatic and Capacitance
The potential gradient across the material of low permittivity is than across the material of high permittivity.

smaller
greater
None of these
both (A) and (B)

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Electrostatic and Capacitance
A capacitor consists of

two conductors only
two conductors separated by an insulator
two insulators only
two insulators separated by a conductor

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Electrostatic and Capacitance
In a cable capacitor, voltage gradient is maximum at the surface of the

Insulator
Sheath
Earth
Conduction

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Electrostatic and Capacitance
The ability of charged bodies to exert force on 6ne another is attributed to the existence of

neutrons
electric field
electrons
protons

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Electrostatic and Capacitance
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because

discharge current can flow
charging current can flow
of high peak value
varying voltage produces the charging and dicharging currents

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