Question detail
Which of the following methods can increase the efficiency of energy transfer?
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. Reducing friction in moving parts
- B. Increasing the temperature of the system
- C. Using thicker insulation materials
- D. Increasing the energy input
Answer
Reducing friction in moving parts
Explanation
The correct option is "Reducing friction in moving parts". Reducing friction in moving parts is right because it directly matches Efficiency: (HT only) Describe ways to increase the efficiency of an intended energy transfer.. 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
Misunderstanding Efficiency Improvements
Students often think that increasing the input energy will always increase the efficiency of a system.
Emphasize that efficiency is about maximizing useful energy output relative to total energy input, and that reducing wasted energy is key to improving efficiency.
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