371315
For a given heat engine, I. Efficiency can be 1 . II. Conversion of heat into work can be done by heating the system by an external furnace, as in a steam engine. Choose the incorrect statement.
1 Only I
2 Only II
3 Neither I nor II
4 Both I and II
Explanation:
Efficiency of a heat engine, \(\eta=1-\dfrac{Q_{2}}{Q_{1}}\) When \(Q_{2}=0\), then \(\eta=1\). However in practice, \(\eta=1\) is never possible even if we can eliminate various kinds of losses associated with actual heat engines. So, option (1) is correct.
PHXI12:THERMODYNAMICS
371316
An engine takes compressed steam at \(127^\circ C\) and rejects it at \(47^\circ C\). Efficiency of the engine is
371315
For a given heat engine, I. Efficiency can be 1 . II. Conversion of heat into work can be done by heating the system by an external furnace, as in a steam engine. Choose the incorrect statement.
1 Only I
2 Only II
3 Neither I nor II
4 Both I and II
Explanation:
Efficiency of a heat engine, \(\eta=1-\dfrac{Q_{2}}{Q_{1}}\) When \(Q_{2}=0\), then \(\eta=1\). However in practice, \(\eta=1\) is never possible even if we can eliminate various kinds of losses associated with actual heat engines. So, option (1) is correct.
PHXI12:THERMODYNAMICS
371316
An engine takes compressed steam at \(127^\circ C\) and rejects it at \(47^\circ C\). Efficiency of the engine is
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PHXI12:THERMODYNAMICS
371315
For a given heat engine, I. Efficiency can be 1 . II. Conversion of heat into work can be done by heating the system by an external furnace, as in a steam engine. Choose the incorrect statement.
1 Only I
2 Only II
3 Neither I nor II
4 Both I and II
Explanation:
Efficiency of a heat engine, \(\eta=1-\dfrac{Q_{2}}{Q_{1}}\) When \(Q_{2}=0\), then \(\eta=1\). However in practice, \(\eta=1\) is never possible even if we can eliminate various kinds of losses associated with actual heat engines. So, option (1) is correct.
PHXI12:THERMODYNAMICS
371316
An engine takes compressed steam at \(127^\circ C\) and rejects it at \(47^\circ C\). Efficiency of the engine is
371315
For a given heat engine, I. Efficiency can be 1 . II. Conversion of heat into work can be done by heating the system by an external furnace, as in a steam engine. Choose the incorrect statement.
1 Only I
2 Only II
3 Neither I nor II
4 Both I and II
Explanation:
Efficiency of a heat engine, \(\eta=1-\dfrac{Q_{2}}{Q_{1}}\) When \(Q_{2}=0\), then \(\eta=1\). However in practice, \(\eta=1\) is never possible even if we can eliminate various kinds of losses associated with actual heat engines. So, option (1) is correct.
PHXI12:THERMODYNAMICS
371316
An engine takes compressed steam at \(127^\circ C\) and rejects it at \(47^\circ C\). Efficiency of the engine is
371315
For a given heat engine, I. Efficiency can be 1 . II. Conversion of heat into work can be done by heating the system by an external furnace, as in a steam engine. Choose the incorrect statement.
1 Only I
2 Only II
3 Neither I nor II
4 Both I and II
Explanation:
Efficiency of a heat engine, \(\eta=1-\dfrac{Q_{2}}{Q_{1}}\) When \(Q_{2}=0\), then \(\eta=1\). However in practice, \(\eta=1\) is never possible even if we can eliminate various kinds of losses associated with actual heat engines. So, option (1) is correct.
PHXI12:THERMODYNAMICS
371316
An engine takes compressed steam at \(127^\circ C\) and rejects it at \(47^\circ C\). Efficiency of the engine is