Question

Two bodies A and B are said to be in thermal equilibrium with each other if

• A. Heat flows from A to B.
• B. Heat flows from B to A.
• C. No heat flows between A and B.
• D. Heat flows between A and B at a constant temperature.

Answer 1

The correct option is C No heat flows between A and B.

Two physical systems are in thermal equilibrium with each other, if there is no net flow of thermal energy between them when they are connected by a path permeable to heat.
Thus, option (c) is the correct answer.