In a heat engine , the temperature of the source and sink are 500 K and 375 K . If the engine consumes `25 xx 10^5 J ` per cycle, find
the efficiency of the engine.

In a heat engine , the temperature of the source and sink are 500 K and 375 K . If the engine consumes 25 xx 10^5 J per cycle, find work done per cycle

In a heat engine , the temperature of the source and sink are 500 K and 375 K . If the engine consumes 25 xx 10^5 J per cycle, find heat rejected to the sink per cycle.

When the absolute temperature of the source of a Carnot heat engine is increased by 25 %, its efficiency increases by 80%. The new efficiency of the engine is

If the absolute temperatures of the source and sink of a heat engine are in the ratio 4 : 3 , its efficiency is

A reversible engine converts one third input into work. When the temperature of the sink is reduced by 62 °C, then efficiency of the engine is tripled. The temperature of the source and sink are

A Carnot's engine used first an ideal monoatomic gas then an ideal diatomic gas. If the source and sink temperature are 411^@C and 69^@C respectively and the engine extracts 1000J of heat in each cycle, then area enclosed by the PV diagram is

A 100 watt filament loses all its power by radiation when it is heated to a temperature of 2500 K. If the diameter of the filament is 0.2 mm and the surface emissivity of the filament is 0.5, find the length of the filament. (Stefan's constant sigma = 5.67 xx10^-8 W/m^2k^4 )

Two engines A and B have their sources at 400 K and 350 K and sinks at 350 K and 300 K respectively. Which is more efficient and by how much ?

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 ?

743 J of heat energy is needed to raise the temperature of 5 moles of an ideal gas by 2 K at constant pressure. How much heat energy is needed to raise the temperature of the same mass of the gas by 2 K at constant volume ?