30. A student builds a simple electric circuit. What are the main types of energy produced in this circuit when the switch is closed?
A thermal and light
B sound and thermal
C light and magnetism
D magnetism and sound

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