Question

A Carnot engine, whose efficiency is $40$ % takes in heat from a source maintained at a temperature of $500$ K. It is desired to have an engine of efficiency $60$ %. Then, the intake temperature for the same exhaust (sink) temperature must be

• A. $600$ K
• B. efficiency of Carnot engine cannot be made larger than $50$%
• C. $1200$ K
• D. $750$ K

Answer 1

The correct option is D $750$ K