Ace the BMAT 2026 – Unleash Your Biomedical Superpowers!

The choice indicating that the power of energy change absorbed equals the power emitted is correct because it describes a state of thermal equilibrium. When an object's absorbed energy matches the energy it emits, there is no net gain or loss of energy, maintaining a consistent temperature.

In this state, any energy absorbed from the surroundings is perfectly balanced by energy radiated away, resulting in a stable internal energy state. This principle is crucial in thermodynamics and can be observed in various phenomena, such as an object in a stable environment where insulation prevents heat loss or when an object is in direct contact with a heat source that matches its cooling rate.

Other scenarios described in the remaining options would lead to changes in temperature. If the power absorbed is less than the power emitted, the object would cool down over time. Conversely, if the power emitted is greater than the power absorbed, the object would also lose energy and cool down. Lastly, stating that the power absorbed is double the power emitted suggests an imbalance that would lead to an increase in temperature, as the object would be gaining energy at a higher rate than it can lose it. Thus, only the condition where the powers are equal allows for temperature stability.