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. Energy is always created during the transfer.
- B. Some energy is always dissipated as wasted energy.
- C. Energy can be destroyed in the process.
- D. All energy transfers are 100% efficient.
Answer
Some energy is always dissipated as wasted energy.
Explanation
In real energy transfers, some energy is lost to the surroundings as heat or other forms of energy, making perfect efficiency impossible.
Common mistake
Confusing Efficiency Representation
Students often express efficiency as a fraction instead of a decimal.
To express efficiency as a decimal, divide the useful energy output by the total energy input and ensure the result is in decimal form.
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