Question

How much power is produced if a voltage of `3 V` is applied to a circuit with a resistance of `18 Omega`?

Answer 1

`0.5 \text(W)`

Explanation:

`P = VI`

and Ohm's Law: `V = I R -> I = V/R`

`P = V^2/R = 3^2/18 = 9/18 = 0.5 \text(W)`