Question

What is the significance of building a dam in hydro power plants?

• A. Dams convert potential energy of water to kinetic energy.
• B. Large amount of water stored in the dams have higher potential energy.
• C. Dams are used for rain water harvesting.
• D. Dams are used to store drainage water.

Answer 1

The correct option is B

Large amount of water stored in the dams have higher potential energy.

Water of a flowing river or canal is stored in dams and it has higher potential energy. This potential energy is converted to kinetic energy by making them fall from a height. The water runs over to the turbines of the generators and thus produces electricity.