Question

Which statement describes the principles on which tidal energy works?

Kinetic energy in the motion of water is converted to electricity.
Potential energy in the motion of water is converted to electricity.
Chemical energy from salt water is converted to electricity.
Mechanical energy from water is converted into electricity.

Answer 1

Mechanical energy from water is converted into electricity.

Tidal systems capture the mechanical energy of moving and/or elevated water (flowing currents — kinetic energy — and height differences — potential energy) and drive turbines or other generators to produce electricity.