A Carnot refrigerator operates between `250^@K` and `300^@K`. Calculate its coefficient of performance.

What is coefficient of coupling (K)?

Describe the working of a refrigerator as a heat pump . Derive an expression for its coefficient of performance.

Relation between K_C and K_p- .

ExpIain coefficient of performance of a refrigerator.

One of the most efficient engines ever developed operated between 2100 K and 700 K . Its actual efficiency is 40%. What percentage of its maximum possible efficiency in this ?

A Carnot engine has the same efficiency between 100 k and 500 k .Calculate the temperature T K & 900 K of the sink.

Describe the operation of a Carnot 's engine. Calculate the efficiency of a Carnot 's engine

A Carnot engine working between 200 Kand 500 K has done work equal to 800 joules. Amount of heat energy supplied to the engine from the source is

A current of 150 mA flows through a wire when the potential difference between its ends is 300 volt. Calculate the resistance of the wire,

Consider a Carnot 's cycle operating between T_1 = 500 K and T_2 = 300 K producing 1 kJ of mechanical work per cycle. Find the heat transferred to the enginer by the reservoirs.