1.

A fully charged capacitor has a capacitance· C. Itis discharged through a small ,coil of - resistance wire embedded in a thermally insulated block of specific heat capacity s andmass. If the temperature of the block is raised by DeltaT, the potential difference V across the capacitance is ...... .

Answer»

`(msDeltaT)/(C)`
`SQRT((2msDeltaT)/(C))`
`sqrt((2mCDeltaT)/(s))`
`(mCDeltaT)/(s)`

Solution :The energy stored in the capacitor = Heat energy gained by the block
`:. (1)/(2) CV^(2)= msDeltaT`
`:. V^(2)= (2msDeltaT)/(C)`
`:. V =sqrt((2msDeltaT)/(s))`


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