Question detail
Why is no real energy transfer perfectly efficient?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Conservation and dissipation of energy
Question
- A. Because energy is created during the transfer
- B. Because some energy is always dissipated as wasted energy
- C. Because energy cannot be transferred at all
- D. Because energy input is always greater than energy output
Answer
Because some energy is always dissipated as wasted energy
Explanation
The correct option is "Because some energy is always dissipated as wasted energy". Because some energy is always dissipated as wasted energy is right because it directly matches Efficiency: Express efficiency as a percentage.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Confusing Efficiency Representation
Students often express efficiency as a decimal instead of a percentage, leading to incorrect answers.
To express efficiency as a percentage, multiply the decimal value by 100.
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