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The electric potential difference across...

The electric potential difference across a wire is constant. If l, A and `rho` are respectively the length, area of cross-section and resistivity of the material of the wire, then the rate of heat proudction in the resistor is

A

directly proportional to l and inversely proportional to A and `rho`

B

directly proportional to A and inversely proportional to `rho` and l

C

directly proportional to `rho` and inversely proportional to l and A

D

inversely proportional to l, A and `rho`

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