Question

Derive the unit of electric power from the given equations:

P = V × `square`

P = `square` × ampere

= 1 volt × 1`square` = `(1 "J")/(1 "C") xx (1 "C")/(1 "s")`

∴ P = `(1 "J")/square` = W(Watt).

Answer 1

P = V × \[\boxed{\text{I}}\]

P = \[\boxed{\text{Volt}}\] × ampere

= 1 volt × 1\[\boxed{\text{ampere}}\] = `(1 "J")/(1 "C") xx (1 "C")/(1 "s")`

∴ P = \[\frac{\text{1 J}}{\boxed{\text{1s}}}\] = W(Watt).