Which device is the most efficient?
Correct answer: A. Nuclear reactor
- 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, typically nuclear fission. Nuclear reactors are highly efficient in terms of energy generation, as they produce a large amount of energy from a relatively small amount of fuel. However, they also pose safety and environmental concerns, including the management of radioactive waste.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Energy Losses and Efficiency
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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