Tag: wave power and tidal power

Questions Related to wave power and tidal power

What are the energy from sea in the below options?

physics sources of energy wave energy tidal energy wave power and tidal power

  1. Tidal energy

  2. Wave energy

  3. Ocean thermal energy

  4. All of above

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Correct Option: D
Explanation:

Tidal -Because of  gravitation pull of Moon, tides in sea are seen.Tidal energy is a form of hydropower which utilizes energy from tides to produce electricity.
Wave - Waves are good source of energy. Waves from the sea are used to run the turbines to generate electricity.
Ocean thermal energy - Water at sea surface is hot during daytime and at lower level is cold. This temperature difference is used to produce energy (electric).

Wave energy harnesses :

physics sources of energy wave energy tidal energy wave power and tidal power

  1. winds produced by huge waves.

  2. waves formed by tides.

  3. potential energy of normal waves.

  4. kinetic energy possessed by huge waves.

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Correct Option: D
Explanation:

In wave energy, kinetic energy possessed by huge waves is trapped to generate electricity with the help of a machine called wave energy convertor. 

Tidal energy is harnessed by:

physics sources of energy wave energy tidal energy wave power and tidal power

  1. transporting sea water to a close dam.

  2. constructing a submerged dam.

  3. constructing a dam across a narrow opening to the sea.

  4. constructing an overhead dam.

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Correct Option: C
Explanation:

Difference in sea-levels due to tides during different times of day gives us tidal energy. Tidal energy is harnessed by constructing a dam across a narrow opening to the sea. A turbine fixed at the opening of the dam converts tidal energy to electricity.

Electricity production from wave energy requires:

physics sources of energy wave energy tidal energy wave power and tidal power

  1. strong waves

  2. mild waves

  3. Either (A) or (B)

  4. None of the above

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Correct Option: A
Explanation:

Wave energy would be a viable proposition only where waves are very strong.