Indian Navy Pilot Sources of Energy — practice questions

Explore 2 free Sources of Energy questions in Indian Navy Pilot Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Sources of Energy questions and exercises with answers

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In a hydroelectric power plant, the energy conversion sequence is:Read the answer and worked solution →A typical single solar cell produces about how much voltage?Read the answer and worked solution →

Worked practice questions

In a hydroelectric power plant, the energy conversion sequence is:

Mechanical -> chemical -> electrical
Sound -> electrical
Potential -> kinetic -> mechanical -> electrical
Solar -> chemical -> electrical

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Correct answer: C. Potential -> kinetic -> mechanical -> electrical

1. Water stored at height has gravitational potential energy. 2. As it falls, the potential energy converts to kinetic energy. 3. The fast-moving water rotates the turbines (mechanical energy). 4. The turbine spins a generator that produces electricity. 5. So the chain is potential -> kinetic -> mechanical -> electrical. _Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_

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A typical single solar cell produces about how much voltage?

0.5 to 1 volt
5 to 10 volts
50 volts
220 volts

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Correct answer: A. 0.5 to 1 volt

1. A silicon solar cell's open-circuit voltage depends on the band gap. 2. For commercial silicon cells this is about 0.5 to 1 volt. 3. To get higher voltages, many cells are wired in series to form a panel. 4. So a single cell gives only 0.5 to 1 V. 5. Current depends on cell area and incident sunlight. _Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_