List of top Physics Questions on carnot cycle

An ideal gas undergoes a cyclic process ABCA wherein AB is an isothermal expansion, BC is an isochoric pressure drop, and CA is an adiabatic compression. The work done by the gas in the complete cycle is:

A Carnot engine operates between temperatures T₁ and T₂ (T₁ > T₂). If T₁ is increased by ∆T and T₂ is decreased by ∆T, its efficiency will:

In an isothermal expansion of an ideal gas, the heat supplied to the gas is:

A refrigerator has a coefficient of performance of 5. If the temperature inside the freezer is $-20^{\circ}C$, the temperature of the surroundings to which it rejects heat is:

A Carnot engine uses diatomic gas as a working substance. During the adiabatic expansion part of the cycle, if the volume of the gas becomes 32 times its initial volume, then the efficiency of the engine is

If the temperature of the source in a Carnot engine is increased while the sink temperature remains constant, the efficiency will:

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 relation between efficiency ((\eta)) of Carnot engine and coefficient of performance ((\beta)) of refrigerator is

The relation between efficiency ((\eta)) of Carnot engine and coefficient of performance ((\beta)) of refrigerator is

Efficiency of a Carnot engine

The relation between efficiency ((\eta)) of Carnot engine and coefficient of performance ((\beta)) of refrigerator is

If the heat supplied to an ideal gas is used up entirely to do work on the surrounding, then the process is called

For which of the following combinations of working temperatures, the efficiency of Carnot's engine is maximum?

An ideal refrigerator has freezer at a temperature of $-13^{\circ}\text{C}$. The coefficient of performance of the engine is $5$. The temperature of the air (to which heat is rejected) is

A Carnot engine operating between two reservoirs has efficiency \(\frac{1}{3}\) When the temperature of cold reservoir raised by \(x\), its efficiency decreases to \(\frac{1}{6}\) The value of \(x\), if the temperature of hot reservoir is \(99^{\circ} C\), will be :

A Carnot engine has efficiency of $50 \%$ .If the temperature of sink is reduced by $40^{\circ} C$, its efficiency increases by $30 \%$ .The temperature of the source will be :

A Carnot engine whose heat sinks at 27°C, has an efficiency of 25%. By how many degrees should the temperature of the source be changed to increase the efficiency by 100% of the original efficiency?

A geyser heats water flowing at a rate of 2.0 kg per minute from 30°C to 70°C. If geyser operates on a gas burner, the rate of combustion of fuel will be __________ g min^–1.
[Heat of combustion = 8 × 10³ Jg^–1, Specific heat of water = 4.2 Jg^–1 °C^–1]

A Carnot engine is operating between a hot body and cold body maintained at temperatures \( T_1 \) and \( T_2 \) respectively. Consider the following three cases:
• Case-I: The temperature of the hot body is changed to \( T_1 + \Delta T \) and cold body is at \( T_2 \).
• Case-II: The temperature of the hot body is at \( T_1 \) and cold body is changed to \( T_2 + \Delta T \).
• Case-III: The temperature of the hot body is at \( T_1 \) and cold body is changed to \( T_2 - \Delta T \). The efficiency of the Carnot cycle is highest for:

Three Carnot engines operate in series between a heat source at a temperature $T_1$ and a heat sink at temperature $T_4$ (see figure). There are two other reservoirs at temperature $T_2$, and $T_3$, as shown, with $T_2 > T_2 > T_3 > T_4$ . The three engines are equally efficient if: