Question

If a current of `8 A` passing through a circuit generates `32 W` of power, what is the resistance of the circuit?

Answer 1

I found: `0.5Omega`

Explanation:

In general Power will be:
`P=V*I`
where `V` is voltage and `I` current.

Using Ohm's Law, `V=R*I`, you can manipulate the above expression to introduce Resistance `R` as:

`P=V*I=color(red)(R*I)*I=R*I^2`
in your case:
`32=8^2*R`
rearranging:
`R=0.5Omega`