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Q.

A fully charged capacitor has a capacitance C. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity s and mass m. If the temperature of the block is raised by T , the potential difference V across the capacitance is

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a

msΔTC

b

2mCΔTs

c

2msΔTC

d

mCΔTs

answer is D.

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Detailed Solution

U=12CV2=msΔT V2=2msΔTCV=2msΔTC.

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A fully charged capacitor has a capacitance C. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity s and mass m. If the temperature of the block is raised by ∆T , the potential difference V across the capacitance is