Electrical power

In mechanics, power can be defined in terms of work. The faster work is done, the greater the power required. Power is therefore work per unit of time. In the case of a consuming device in an electrical circuit, electrical energy is converted into kinetic energy (e.g. rotation in an electric motor), light radiation (e.g. electric lamp) or thermal energy (e.g. electric heater, electric lamp).

The faster the energy is converted, the higher the electrical power. Power in this case is therefore converted into energy per time. It increases as the current and voltage grow. The electrical power of a consuming device is also referred to as electrical consumption.

P = V ⋅I

P = power Unit: watt (W)

V = voltage Unit: volt (V)

I = current intensity Unit: ampere (A)