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Electrostatic and Capacitance

Electrostatic and Capacitance
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is

24 µs
48 µs
2.42 µs
480 µs

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Electrostatic and Capacitance
The relative permittivity has the following units

F/m
Wb/m
no units
m/F

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Electrostatic and Capacitance
The capacitor preferred for high frequency circuits is

Air
Paper
None of the listed here
Mica

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Electrostatic and Capacitance
A condenser suitable for D.C. only is

Poled aluminium electrolytic condenser
Oil impregnated paper condenser
Metallic plate variable gang condenser
Metallic paper capacitor

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Electrostatic and Capacitance
The direction of electric field due +0 positive charge is .

None of these
both (A) and (B)
towards the charge
away from the charge

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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

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

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