Question

How much power is produced if a voltage of `1 V` is applied to a circuit with a resistance of `2 Omega`?

Answer 1

`P=0,5 W`

Explanation:

`P=V*I`
`R=V/I" the ohm's law"`

`I=V/R`

`P=V*V/R`

`P=V^2/R`

`V=1V" "R=2" " Ohm`

`P=1^2/2`

`P=1/2`

`P=0,5 W`