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NEET 2007 (AIPMT) · Combination of Capacitors

Combination of Capacitors question from NEET 2007 (AIPMT)

Q90NEET 2007 · AIPMTMedium

Combination of Capacitors

Two condensers, one of capacity C and other of capacity C/2 are connected to a V-volt battery, as shown in the figure. The work done in charging fully both the condensers is

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Answer: (b)

Both condensers are across the battery, i.e. in parallel: $C_p = C + \frac{C}{2} = \frac{3C}{2}$ .
Energy stored $= \frac{1}{2}C_pV^2 = \frac{3}{4}CV^2$ .
So the answer is (b) $\frac{3}{4}CV^2$ .

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