Question

A charge of `27 C` passes through a circuit every `3 s`. If the circuit can generate `72 W` of power, what is the circuit's resistance?

Answer 1

`R=8/9 Ohm`

Explanation:

`"given data:"`
`q=27C" charge"`
`Delta t=3 s" time interval"`
`P=72W" Power"`
`R=?" Resistance"`

`so" " P=I^2*R`

`"we must calculate the electric current I"`
`I=(Delta q)/(Delta t)`

`I=27/3=9A`

`cancel(72)=cancel(9)^2*R`

`8=9*R`

`R=8/9 Ohm`