An ideal heat engine operates on Carnot cycle between $227\,^oC$ and $127\,^oC$. It absorbs $6 \times 10^4\, cal$ at the higher temperature. The amount of heat converted into work equals to

An ideal monoatomic gas is taken round the cycle $ABCDA$ as shown in following $P-V$ diagram. The work done during the cycle is

The efficiency of a Carnot's engine, working between steam point and ice point, will be  $….\,\%$

A carnot engine operation between temperature $T_1$ and $T_2$ has efficiency $\frac{1}{6}$. When $T_2$ is lowered by $62\, K$, its efficiency increase to  $\frac{1}{3}$. Then $T_1$ and $T_2$ are, respectively

Helium gas goes through a cycle $ABCDA$ (consisting of two isochoric and two isobaric lines) as shown in figure. Efficiency of this cycle is nearly ….. $\%$ (Assume the gas to be close to ideal gas)