The phenomenon where an electric current is produced by shining a light on a metal plate is called the effect. The minimum frequency required to cause to flow is called the frequency. This frequency depends on the identity of the metal used.

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Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy