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Question

An inventor states that the new engine invented rejects 30% of the heat it absorbs from the reservoir, while the temperature of the source and the sink are maintained at 500 K and 200 K respectively. His engine is equivalent to ________.

एक आविष्कारक का कहना है कि आविष्कार किया गया नया इंजन जलाशय से अवशोषित गर्मी का 30% अस्वीकार कर देता है, जबकि स्रोत और सिंक का तापमान क्रमशः 500 K और 200 K पर बनाए रखा जाता है। उसका इंजन ________ के बराबर है।

A.

Carnot engine

B.

Joule engine

C.

Impossible engine

D.

Stirling engine

Answer ( Option C)

Impossible engine

Solution

Given:


Therefore, this engine is not possible.

..Method 2..


Thus it is not possible for an engine to have higher efficiency than Carnot engine, so it is impossible.

Hence, the correct option is (C).

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