Ncert Exercises & Solutions

Consider a heat engine as shown in the figure. $Q_{1} and Q_{2}$ are heat added to $T_{1}$ and heat taken from $T_{2}$ respectively, in one cycle of the engine. W is the mechanical work done on the engine.

If W > 0, then possibilities are:

$(a) Q_{1} > Q_{2} > 0 (b) Q_{2} > Q_{1} > 0 (c) Q_{2} < Q_{1} < 0 (d) Q_{1} < 0, Q_{2} > 0$

Choose the correct alternatives:
1. (b, c)

2. (a, d)

3. (b, d)

4. (a, c)

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