Two thermometers X and Y are placed inside an enclosure whose walls are maintained at a steady temperature T When equilibrium is established, X and Y will give the same reading T

Question

Two thermometers X and Y are placed inside an enclosure whose walls are maintained at a steady temperature T When equilibrium is established, X and Y will give the same reading T (A) under all circumstances (B) only if they absorb radiation at equal rates (C) only if both are perfect absorbers (D) only if they have equal thermal capacities

Tardigrade Admin · Accepted Answer

By Zeroth law of thermodynamics, if two bodies are in thermal equilibrium with a third body, then all of them are at the same temperature. Hence (a) is the correct answer.

Q. Two thermometers X and Y are placed inside an enclosure whose walls are maintained at a steady temperature T When equilibrium is established, X and Y will give the same reading T

under all circumstances

only if they absorb radiation at equal rates

only if both are perfect absorbers

only if they have equal thermal capacities

By Zeroth law of thermodynamics, if two bodies are in thermal equilibrium with a third body, then all of them are at the same temperature. Hence (a) is the correct answer.