The energy used is electricity.
mechanical, electrical, sound, thermal, chemical, light, solar, and nuclear
Electrical energy
A motor is used to power a windmill.
energy
Renewable. It uses the movement of the oceans to generate electricity when it is used for power.
Watts. Also for any other type of power (energy / time), that is, for transfer of energy that is not electrical in nature.
Gasoline is used for the energy to power a car.
Those resources can be converted into whatever type of power is needed.
The equipment might have circuits which remain energised when it is in an off-cycle, but the energy used would probably be less than 1% of the energy used in the on-cycle.
Turbo Alternators are used in thermal power stations because of the steam energy to mechanical energy conversion turbo alternator is more effitient
The energy used to power a computer is Electrical Energy.
water, was used as power for mills in the industrial revaluation. Coal is sometimes used to make energy, also wind. It really depends on what type of power is being created.