Free Energy Losses and Efficiency MCQs with Answers
22 Energy Losses and Efficiency MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Efficiency compares useful output energy or power with the total input, usually expressed as a percentage. The topic covers energy losses through friction, heating, resistance and sound, along with power ratings and Sankey diagrams. Efficiency is not the same as conservation of energy, because lost energy is transferred rather than destroyed.
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22 questions · page 2 of 2
- A. Nuclear reactor
- B. Storage battery
- C. Silicon solar cell
- D. Dry battery cell
Explanation: a) Nuclear reactor: A nuclear reactor is a device that generates electricity by harnessing the energy released during nuclear reactions…
Correct answer: Nuclear reactor- A. Output of machine
- B. Input of machine
- C. Efficiency
- D. Work
Explanation: Output=load*distance through which the load moves
Correct answer: Output of machine