What is the working mechanism of a dam in hydro-power plants?

Dams convert potential energy of water stored in the dam to kinetic energy when doors of the dam are opened and then to electrical energy with the help of turbine.

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Dams convert kinetic energy of flowing water inside the dam to potential energy when doors of the dam are opened and then to electrical energy with the help of turbine.

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No energy conversion occurs.

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Dams convert electrostatic energy of flowing water inside the dam to potential energy when doors of the dam are opened and then to electrical energy with the help of turbine.

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Solution

The correct option is A Dams convert potential energy of water stored in the dam to kinetic energy when doors of the dam are opened and then to electrical energy with the help of turbine.
Dam obstruct the flow of water and water level rises thereby increasing the potential energy which is further converted to kinetic and then to electric energy.

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Similar questions

Q. Question 8
Water stored in a dam possesses

(a) no energy
(b) electrical energy
(c) kinetic energy
(d) potential energy

Statement 1: Dams are constructed to produce hydro electricity.

Statement 2: Dams obstruct the flow of water and water level rises, thereby increasing the potential energy which is further converted to kinetic energy, and then to electrical energy.

When the water stored in dams is made to run a turbine, the potential energy of stored water partly changes into electric energy.

Statement 1: Dams are constructed to produce hydel electricity.

Statement 2: Dam obstructs the flow of water and water level rises thereby increasing the potential energy which is further converted to kinetic and then to electric energy.

Q. Arrange the following steps in the conversion of hydel energy to electricity in a proper sequence.
(a) Released water is made to fall on the blades of the turbines.
(b) Water in the dam is released.
(c) Water is collected in the dam.
(d) Potential energy is converted to kinetic energy.
(e) The armature of the electric generator rotates to produce electricity.

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