MCQ
Efficiency of Carnot engine is $100 \%$ if
- A$T_2=273 K$
- ✓$T_2=0 \mathrm{~K}$
- C$T_1=273 K$
- D$T_1=0 \mathrm{~K}$
✓
Answer
Correct option: B.
$T_2=0 \mathrm{~K}$
$ \eta=1-\frac{T_2}{T_1}$ for $100$ efficiency $(\eta=1)$ which gives $(T=0\mathrm{~K})$
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