The efficiency of Carnot engine is \( 50 \% \) and temperature of s...

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The efficiency of Carnot engine is \( 50 \% \) and temperature of sink is \( 500 \mathrm{~K} \). If temperature of
\( \mathrm{P} \) source is kept constant and its efficiency raised to

W. \( 60 \% \), then the required temperature of sink will be
(a) \( 100 \mathrm{~K} \)
(b) \( 600 \mathrm{~K} \)
(c) \( 400 \mathrm{~K} \)
(d) \( 500 \mathrm{~K} \)
(2002)
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