148565 The efficiency of Carnot engine is $50 \%$ and temperature of sink is $500 \mathrm{~K}$. If the temperature of source is kept constant and its efficiency is to be raised to $60 \%$, then the required temperature of the sink will be :

148566 A heat engine is working between $27^{\circ} \mathrm{C}$ and $127^{\circ} \mathrm{C}$. If $1000 \mathrm{~J}$ of heat is absorbed at the source, the amount of heat rejected to the sink and the useful work done, in $J$. are respectively,

148567 Two Carnot engines $A$ and $B$ are operated in series. The engine $A$ receives heat from the source at temperature $T_{1}$ and rejects the heat to the sink at temperature $T$. The second engine $B$ receives the heat at temperature $T$ and rejects to its sink at temperature $T_{2}$. For what value of $T$ the efficiencies of the two engines are equal

148568 If sink is at a temperature of $-39^{\circ} \mathrm{C}$ and source at $0^{\circ} \mathrm{C}$, then efficiency will be

148565 The efficiency of Carnot engine is $50 \%$ and temperature of sink is $500 \mathrm{~K}$. If the temperature of source is kept constant and its efficiency is to be raised to $60 \%$, then the required temperature of the sink will be :

148566 A heat engine is working between $27^{\circ} \mathrm{C}$ and $127^{\circ} \mathrm{C}$. If $1000 \mathrm{~J}$ of heat is absorbed at the source, the amount of heat rejected to the sink and the useful work done, in $J$. are respectively,

148567 Two Carnot engines $A$ and $B$ are operated in series. The engine $A$ receives heat from the source at temperature $T_{1}$ and rejects the heat to the sink at temperature $T$. The second engine $B$ receives the heat at temperature $T$ and rejects to its sink at temperature $T_{2}$. For what value of $T$ the efficiencies of the two engines are equal

148568 If sink is at a temperature of $-39^{\circ} \mathrm{C}$ and source at $0^{\circ} \mathrm{C}$, then efficiency will be

148565 The efficiency of Carnot engine is $50 \%$ and temperature of sink is $500 \mathrm{~K}$. If the temperature of source is kept constant and its efficiency is to be raised to $60 \%$, then the required temperature of the sink will be :

148566 A heat engine is working between $27^{\circ} \mathrm{C}$ and $127^{\circ} \mathrm{C}$. If $1000 \mathrm{~J}$ of heat is absorbed at the source, the amount of heat rejected to the sink and the useful work done, in $J$. are respectively,

148567 Two Carnot engines $A$ and $B$ are operated in series. The engine $A$ receives heat from the source at temperature $T_{1}$ and rejects the heat to the sink at temperature $T$. The second engine $B$ receives the heat at temperature $T$ and rejects to its sink at temperature $T_{2}$. For what value of $T$ the efficiencies of the two engines are equal

148568 If sink is at a temperature of $-39^{\circ} \mathrm{C}$ and source at $0^{\circ} \mathrm{C}$, then efficiency will be

148565 The efficiency of Carnot engine is $50 \%$ and temperature of sink is $500 \mathrm{~K}$. If the temperature of source is kept constant and its efficiency is to be raised to $60 \%$, then the required temperature of the sink will be :

148566 A heat engine is working between $27^{\circ} \mathrm{C}$ and $127^{\circ} \mathrm{C}$. If $1000 \mathrm{~J}$ of heat is absorbed at the source, the amount of heat rejected to the sink and the useful work done, in $J$. are respectively,

148567 Two Carnot engines $A$ and $B$ are operated in series. The engine $A$ receives heat from the source at temperature $T_{1}$ and rejects the heat to the sink at temperature $T$. The second engine $B$ receives the heat at temperature $T$ and rejects to its sink at temperature $T_{2}$. For what value of $T$ the efficiencies of the two engines are equal

148568 If sink is at a temperature of $-39^{\circ} \mathrm{C}$ and source at $0^{\circ} \mathrm{C}$, then efficiency will be