38. Solar energy conversion cell: (Work, Power & Energy, renewable energy resources)
Correct answer: B. Photovoltaic
- A. Rotatory
- B. Photovoltaic
- C. Galvanic
- D. None
Explanation
Photovoltaic cells convert solar energy directly into electrical energy through the photoelectric effect.Incorrect Options:(a) Rotatory: Incorrect. Rotatory cells use mechanical movement, not solar energy.(c) Galvanic: Incorrect. Galvanic cells involve chemical reactions, not solar energy.(d) None of these: Incorrect. Photovoltaic cells are well-known for converting solar energy.
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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