List of top Physics Questions on carnot cycle asked in MHT CET

If the temperature of a hot reservoir is 600K and the cold reservoir is 300K, the efficiency of the Carnot engine is:

A Carnot engine works between \(600\,\text{K}\) and \(300\,\text{K}\). Find its efficiency.

The efficiency of a heat engine is '$\eta$' and the coefficient of performance of a refrigerator is '$\beta$'. Then