Question detail
What does it mean when we say energy is 'wasted'?
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 lost and cannot be used
- B. Energy is used efficiently
- C. Energy is stored for future use
- D. Energy is converted into useful work
Answer
Energy is lost and cannot be used
Explanation
The correct option is "Energy is lost and cannot be used". Energy is lost and cannot be used 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.
Related flashcards
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Related practice questions
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