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A capacitor of capacitance ‘C’ is fully charged by a $200\;V$ supply. It is then discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat $2.5 \times 10^2 \;J kg^{–}1k^{–1}$ and of mass $0.1\; kg$. If the temperature of the block rises by 0.4k, the value of C is

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$(A) 500 \mu F$
Hence A is the correct answer.
answered Jun 23, 2014 by meena.p
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