MHTCET 15 Apr 2026 Shift 2 Paper

Concept:In a cyclic process, the system returns to its initial state, so the change in internal energy is zero.Explanation:For any cyclic process, the initial and final states are identical.Hence, the change in internal energy is:$$\Delta U = 0$$According to the first law of thermodynamics:$$\Delta Q = \Delta U + \Delta W$$where $\Delta Q$ is the heat given to the system and $\Delta W$ is the work done by the system.Substituting $\Delta U = 0$ into the first law equation gives:$$\Delta Q = 0 + \Delta W$$$$\Delta Q = \Delta W$$Therefore, the work done by the system in a cyclic process is exactly equal to the heat given to the system.Answer:B. equal to the heat given to system.