Electric Circuits
The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is

  55.1 µ joules.
 20 µ joules.
 18 µ joules.
 10 µ joules.

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Electric Circuits
Two electric bulbs have transparent filament of same thickness. It one of them gives 60 W and other gives 100 W, then-

 60 W and 100 W lamp filament have equal length.
 100 W lamp filament has longer length.
 60 W lamp filament has longer length.
 60 W lamp filament has shorter length.

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