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ELECTROSTATIC AND CAPACITANCE

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, initial
62, initial
37, final
62, final

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

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

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Electrostatic and Capacitance
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

Voltage across the plates decreases
Voltage across the plates increases
Charge on the capacitor increases
Charge on the capacitor decreases

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Electrostatic and Capacitance
The sparking between two electrical contacts can be reduced by inserting a

resistance in line
capacitor in parallel with contacts
None of these
capacitor in series with each contact

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Electrostatic and Capacitance
The units of volume charge density are

Coulomb/meter
Coulomb/meter
Coulomb/meter
Coulomb/meter

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