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Electrostatic and Capacitance

Electrostatic and Capacitance
An electrolytic capacitor can be used for

AC & DC both
AC only
None of the listed here
DC only

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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?

3.5 ms
70.5 ms
35 ms
352 ms

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Electrostatic and Capacitance
The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by

R/C
C/R
1/RC
RC

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Electrostatic and Capacitance
_______ field is associated with the capacitor.

None of the listed here
Both Electric & Magnetic
Electric
Magnetic

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Electrostatic and Capacitance
To prevent the generation of static charges on rubber or flat leather

Talcum powder is sprayed on the surface
Surface is moistened
Conductive dressing is done
Oil compound dressing is done

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

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