Question

Which of the following represents the correct order of energy change in Hydroelectric power stations?

• A. Heat energy→Chemical energy→Mechanical energy→Electrical energy
• B. Potential energy→Kinetic energy→Mechanical energy→Electrical energy
• C. Potential energy→Mechanical energy→Kinetic energy→Electrical energy
• D. Heat energy→Kinetic energy→Mechanical energy→Electrical energy

Answer 1

The correct option is B

Potential energy→Kinetic energy→Mechanical energy→Electrical energy

Hydroelectric power plants deploy the potential energy and kinetic energy of water to generate electricity. A turbine converts the kinetic energy of falling water into mechanical energy. Using a generator, the mechanical energy from the turbine is converted into electrical energy.
Hence the energy change is
Potential energy→Kinetic energy→Mechanical energy→Electrical energy