# What Should Be the Condition for the Efficiency of a Carnot Engine to Be Equal to 1? - Physics

Short Note

What should be the condition for the efficiency of a Carnot engine to be equal to 1?

#### Solution

Efficiency of Carnot engine, eta=W/Q_1=(Q_1-Q_2)/Q_1

Here,

W = Work done by the engine

Q1 = Heat abstracted from the source

Q2 = Heat transferred to the sink

Thus, for eta=1, W=Q_1" or " Q_2=0, the total heat which is abstracted from the source gets converted into work.

Concept: Carnot Engine
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 4 Laws of Thermodynamics
Short Answers | Q 14 | Page 60