A Carnot engine has an efficiency of when the temperature of the hot reservoir is

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

A Carnot engine has an efficiency of 40%40\% when the temperature of the hot reservoir is 227∘C227^{\circ}\text{C}. What is the temperature of the cold reservoir? (a) 84∘C84^{\circ}\text{C} (b) −27∘C-27^{\circ}\text{C} (c) 27∘C27^{\circ}\text{C} (d) 136∘C136^{\circ}\text{C}

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