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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.

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

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Electrostatic and Capacitance
Dielectric strength of medium

None of the listed here
Increases with moisture content
Is same for all insulating materials
Increases with rise in temperature

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Electrostatic and Capacitance
The units of capacitance are

Coulomb/volt
Volt/coulomb
Hennry
Hennry/wb

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

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Electrostatic and Capacitance
Paper condenser is

Usually of fixed value
None of the listed here
Always polarised
Electrolytic condenser

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Electrostatic and Capacitance
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?

It will melt
It will become magnetic
Its molecular structure will get changed
It will get punctured or cracked

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