JEE Main 2021 Physics question
Due to cold weather a 1 m water pipe of cross–sectional area 1 is filled with ice at –10°C. Resistive heating is used to melt the ice. Current of 0.5 A is passed through 4 k resistance. Assuming all the heat produced is used for melting, what is the minimum time required ? (Given latent heat of fusion for water/ice = J , specific heat of ice = J and density of ice = kg/)
Answer: (B)