Electric Heaters Can Operate at Efficiencies Very Close to 100

question 46

Multiple Choice

Electric heaters can operate at efficiencies very close to 100%. This does not contradict the fact that Carnot engines are the most efficient heat engines because

• A) electric heaters have very low temperature exhaust.
• B) electric heaters reduce the total entropy of a room.
• C) Carnot engines cannot be used to heat things.
• D) electric heaters are not heat engines.

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