cylinder of mass 0 5 kg is heated electrically by a 12 W

Last updated: 6/2/2023

cylinder of mass 0 5 kg is heated electrically by a 12 W heater in a room at 15 C Th cylinder temperature rises uniformly to 25 C in 5 min and finally becomes constant at 45 Assuming that the rate of heat loss is proportional to the excess temperature over surroundings A the rate of loss of heat of the cylinder to surrounding at 20 C is 2 W B the rate of loss of heat of the cylinder to surrounding at 45 C is 12 W 240 C specific heat capacity of metal is J kg C In 3 2 D none of the above