Question

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.

• A. Statement 1 and Statement 2 are correct, But statement 2 is not the reason for statement 1
• B. Statement 1 is correct and statement 2 is incorrect
• C. Statement 1 and statement 2 are correct , statement 2 is the reason for statement 1
• D. Both statements are incorrect

Answer 1

The correct option is C

Statement 1 and statement 2 are correct , statement 2 is the reason for statement 1

When the water is stored in the dam, it possesses potential energy. After the dam is opened, the water starts flowing downward towards the turbine. Therefore, potential energy is converted to kinetic energy. As the water hits the turbine, it forces turbine to rotate. The rotation of turbine produces electrical energy. So, potential energy of the dam is converted to electrical energy.