Question

Newton's law of cooling holds good only, if the temperature difference between the body and the surroundings is

• A. less than 10$^{\circ}$C
• B. more than 10$^{\circ}$C
• C. less than 100$^{\circ}$C
• D. more than 100$^{\circ}$C

Answer 1

Answer: (A)

less than 10$^{\circ}$C

Answer 2

When temperature difference between the body and the surroundings is small, then loss of heat energy from the body is mainly due to the process of convection. In such a case, the rate of cooling of the body is governed by Newton's law of cooling.