Transmission Of Heat Question 155

Question: Two thermometers A and B are exposed in sun light. The valve of A is painted black, But that of B is not painted. The correct statement regarding this case is

[BHU (Med.) 1999; MH CET 1999]

Options:

A) Temperature of A will rise faster than B but the final temperature will be the same in both

B) Both A and B show equal rise in beginning

C) Temperature of A will remain more than B

D) Temperature of B will rise faster

Show Answer

Answer:

Correct Answer: A

Solution:

As for a black body rate of absorption of heat is more. Hence thermometer A shows faster rise in temperature but finally both will acquire the atmospheric temperature.