A copper voltameter is connected in series with a heater coil of resistance `0.1 Omega` . A steady current flows in the circuit for twenty minutes and mass of 0.99 g of copper is deposited at the cathode. If electrochemical equivalent of copper is `0.00033` gm/C , then heat generated in the coil is
A. 750 J
B. 650 J
C. 350 J
D. 250 J