A engine goes through a cyclic process. During the cyclic process the engine takes in 3,200 J of heat and has a heat output of 2,400 J. What is the efficiency of the engine?
A) 10%
B) 15%
C) 25%
D) 40%
E) 52%

Question

Quizplus · Accepted Answer

Efficiency = (Heat output / Heat input) * 100%
Efficiency = (2400 J / 3200 J) * 100% = 0.75 * 100% = 75%
Therefore, the efficiency of the engine is 25%. Option C is the closest answer to this value.

A Engine Goes Through a Cyclic Process