Electrical force is the rate at which electrical vitality is changed over to another structure, for example, movement, heat, or an electromagnetic field. The basic image for power is the capitalized letter P. The standard unit is the watt, symbolized by W.

One watt is the force coming about because of a vitality dispersal, transformation, or capacity process proportionate to one joule for each second. At the point when communicated in watts, power is once in a while called wattage. The wattage in an immediate current (DC) circuit is equivalent to the result of the voltage in volts and the current in amperes. This standard additionally holds for low-recurrence substituting current (AC) circuits in which vitality is neither put away nor discharged. At high AC frequencies, in which vitality is put away and discharged (just as disseminated or changed over), the articulation for power is increasingly mind boggling.

In a DC circuit, power is a scalar (one-dimensional) amount. In the general AC case, the assurance of intensity requires two measurements, since AC power is a vector amount. Accepting there is no reactance (resistance to AC however not to DC) in an AC circuit, the force can be determined by the above recipes for DC, utilizing pull mean-square qualities for the substituting current and voltage. In the event that reactance exists, some force is on the other hand put away and discharged by the framework. This is called clear force or receptive force. The opposition scatters power as warmth or changes over it to some other unmistakable structure; this is called genuine force. The vector mix of reactance and obstruction is known as impedance.