Question

If a heat engine absorbs heat at 600°K and rejects heat at 200°K its efficiency is
a) 33%
b) 50%
c) 67%
d) 80%​

Answer 1

Answer:

c is the correct answer 67%

Answer 2

The correct answer is option C.

Given: Heat absorbed by heat engine = 600 K.

Heat rejected by heat engine = 200 K.

To Find: Efficiency of engine.

Solution:

Percentage of efficiency of engine = $\frac{Q_{1} -Q_{2} }{Q_{1} }*100$

Here, $Q_{1} =600 K$ and $Q_{2} =400K$.

Efficiency = $\frac{600-200}{600}*100$

= $\frac{400}{600}*100$

= $\frac{2}{3}*100$

= 67%

Hence, the efficiency of engine. is 67%.

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