Question

A charge of `15 C` passes through a circuit every `5 s`. If the circuit can generate `15 W` of power, what is the circuit's resistance?

Answer 1

`R=5/3 " ohm"`

Explanation:

`I=(Delta Q)/(Delta t)`
`Delta Q=15 C" "Delta t=5 " "s`
`I=15/5=3" "A`
`P=I^2*R" "P:Power" "" R:Resistance`
`15=3^2*R`
`15=9*R`
`5=3*R`
`R=5/3 " ohm"`