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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
62, final
37, final

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Electrostatic and Capacitance
Electric displacement is a______quantity.

None of the listed here
Scalar quantity
Vector quantity
Both scalar & vector

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Electrostatic and Capacitance
If three 15 uF capacitors are connected in series, the net capacitance is

20 uF
10 uF
5 uF
15 uF

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Electrostatic and Capacitance
The relative permittivity has the following units

m/F
F/m
Wb/m
no units

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Electrostatic and Capacitance
Which medium has the least dielectric strength ?

Water
Paraffin wax
Glass
Air

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

Paper
Glass
Air
Bakelite

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