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An uncharged capacitor is connected to a battery. On charging the capacitor :

(A) All energy supplied is stored in the capacitor.

(B)Half the energy supplied is stored in the capacitor.

(C) Energy stored depends only on capacity of capacitors.

(D)Energy stored depends upon the time for which capacitor is charged.

Can you answer this question?
 
 

1 Answer

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$U= \large\frac{1}{9} \frac{q^2}{c}$
$q= q_0 (1-e^{-t/RC})$
$\therefore$ q depends on time
$\therefore $ energy stored depends on time for which battery is connected.
Hence D is the correct answer.
answered Jan 6, 2014 by meena.p
 

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