Question

A charge of `54 C` passes through a circuit every `6 s`. If the circuit can generate `9 W` of power, what is the circuit's resistance?

Answer 1

I found: `0.1 Omega`

Explanation:

Remembering that current is the amount of charge passing in one second we can write:
`I=Q/t=54/6=9A`
Also, power can be written as: `P=I^2R`
rearanging:
`R=P/I^2=9/9^2=1/9=0.1Omega`