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Electrostatic and Capacitance

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)
None of these
greater

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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
The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.

37, final
62, initial
62, final
37, initial

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Electrostatic and Capacitance
Which of the following capacitors is polarized?

Electrolytic
Ceramic
Mica
Plastic-film

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Electrostatic and Capacitance
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased

VR and VC = 0
VC > VR
VR = VC
VR > VC

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Electrostatic and Capacitance
Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them

all in series
two in series and third in parallel across this combination
two in parallel and third in series with this combination
all in parallel

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