Which type of energy is often converted by generators in power systems?

Generators in power systems primarily convert mechanical energy into electrical energy. This mechanical energy typically comes from the movement of turbines, which can be powered by various sources such as steam, water, or wind.

In many conventional power plants, mechanical energy is derived from burning fossil fuels to create steam that drives a turbine. In hydroelectric plants, the mechanical energy comes from the flow of water turning the turbines. Wind turbines harness mechanical energy from the wind to generate electricity directly. Ultimately, the process involves converting kinetic energy from motion into electrical energy, which is why mechanical energy is the correct answer.

While nuclear, solar, and geothermal energies can also be part of the energy generation process, they generally involve converting those specific energy types into mechanical energy first before a generator can produce electricity.