Write down the various forms of expression for power in electrical circuit.

Explanation

The electric power P is the rate at which the electrical potential energy is delivered,
`P=(dU)/(dt)=(1)/(dt) (V.dQ)=V. (dQ)/(dt)`
[dU =V.dQ]
The electric power delivered by the battery to any electrical system
P=VI
The electric power delivered to the resistance R is expressed in other forms.
`P=VI=I(IR)=I^(2)R`
`P=IV=(V/R)V=V^(2)/R`