Question detail
Which of the following is an example of reducing wasted energy?
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. Using thicker walls for insulation
- B. Increasing the total energy input
- C. Using more energy-efficient appliances
- D. Reducing the useful energy output
Answer
Using more energy-efficient appliances
Explanation
The correct option is "Using more energy-efficient appliances". Using more energy-efficient appliances 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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