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Indian Navy INET Sources of Energy — practice questions

Explore 3 free Sources of Energy questions in Indian Navy INET 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

Showing questions 1–3 of 3.

Which of the following is a renewable source of energy?Read the answer and worked solution →The role of the glass sheet in a solar cooker is to:Read the answer and worked solution →Compared with a fossil-fuel plant of the same output, a hydroelectric plant has:Read the answer and worked solution →

Worked practice questions

Which of the following is a renewable source of energy?

  1. Wind
  2. Petroleum
  3. Coal
  4. Natural gas
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Correct answer: A. Wind

1. Renewable sources are continuously replenished. 2. Wind is driven by solar heating and never depletes on human timescales. 3. Coal, petroleum and natural gas are fossil fuels formed over millions of years. 4. So wind is the renewable source listed. _Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_

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The role of the glass sheet in a solar cooker is to:

  1. Trap heat by greenhouse effect
  2. Reflect sunlight away
  3. Reduce dust
  4. Make the cooker waterproof
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Correct answer: A. Trap heat by greenhouse effect

1. The glass sheet covers the top of the solar cooker. 2. Sunlight passes through the glass and is absorbed inside. 3. The absorbed energy is re-emitted as longer-wavelength infrared radiation. 4. The glass blocks the outgoing infrared, trapping the heat (greenhouse effect). 5. So the glass sheet retains heat inside the cooker. _Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_

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Compared with a fossil-fuel plant of the same output, a hydroelectric plant has:

  1. Higher pollution
  2. No moving parts by common convention
  3. Higher fuel cost
  4. Lower fuel cost and lower air pollution
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Correct answer: D. Lower fuel cost and lower air pollution

1. A hydroelectric plant uses falling water, which is free and continuously replenished. 2. There is no combustion, so no CO2 or other air pollutants are emitted. 3. Fossil plants must buy fuel and release pollutants. 4. So hydroelectric plants have lower fuel cost and far less air pollution. 5. The main hydro drawback is ecological disruption from large dams. _Source: syllabus Science Ch 14 'Sources of Energy' (byjus.com extract)_

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