Question detail
What happens to the efficiency of a device if the wasted energy increases?
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. Efficiency increases.
- B. Efficiency decreases.
- C. Efficiency remains the same.
- D. Efficiency becomes negative.
Answer
Efficiency decreases.
Explanation
The correct option is "Efficiency decreases.". Efficiency decreases. is right because it directly matches Efficiency: Convert efficiency values between decimals and percentages.. 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 Formats
Students often confuse decimal and percentage formats for efficiency, mistakenly stating a decimal value as a percentage.
To fix this, remember to multiply the decimal efficiency by 100 to convert it to a percentage.
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