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Electrostatic and Capacitance

Electrostatic and Capacitance
Which is the most superior dielectric out of the following ?

Bakelite
Air
Glass
Paper

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Electrostatic and Capacitance
While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is

Short-circuit
Leaky
Alright
Open-circuit

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Electrostatic and Capacitance
Which of the following expression is correct for electric field strength ?

None of the listed here
E = D/€
E = jtD
E = D2/t

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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?

35 ms
352 ms
3.5 ms
70.5 ms

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

Electric intensity
Electric flux
Magnetic flux density
Magnetic flux

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Electrostatic and Capacitance
The unit of dielectric strength is given by

V2/m
m/V
V/m
m/V2

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