Which of the following statements regarding Carnot engine is/are correct? 1. It is an irreversible engine operating between two temperatures 7, (source) and T, (sink). 2. Its efficiency is given by n=1-T)/],, where T, is the temperature of source and Ty is the temperature… | UPSC CAPF 2026 Q No 119

Accepted Answer: (B) 2 only

Topic Covered: Physics

Key Concept: Mechanics, electricity, waves and thermodynamics

The correct option follows from the governing physical law or definition. “2 only” is consistent with the required relationship between the quantities or phenomenon described.

The key is to apply the central fact, formula, definition or relationship tested in the question and then eliminate alternatives that do not satisfy it.