Water of volume 2 L in a closed container is heated with a coil of 1 kW. While water is heated, the container loses energy at a rate of 160 J/s. In how much time will the temperature of water rise from 27°C to 77°C ? (Specific heat of water is 4.2 kJ/kg and that of the container is negligible).
← JEE Main 2014 · 9 Apr · Shift 1
PhysicsSingle correct+4 / -1Question 11 of 90
JEE Main 2014 · 9 Apr · Shift 1, Physics question 11
Answer and worked solution
Official answer: A
Heat needed: J. The net power is W, so