A certain refrigerator initially operates between and

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

Problem

A certain refrigerator initially operates between

T_H = 300\,\text{K}

and

T_C = 275\,\text{K}

. If the cold-space temperature is lowered to

260\,\text{K}

while

T_H

remains unchanged, how will its maximum possible COP change? (a) It will remain the same (b) It cannot be predicted without knowing the work input (c) It will decrease (d) It will increase

Related theory

Heat Engines
Thermodynamics
Second law and Carnot cycle
Carnot engine

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