Question

A charge of `40 C` passes through a circuit every `5 s`. If the circuit can generate `16 W` of power, what is the circuit's resistance?

Answer 1

`R=1/4=0.25" "Omega`

Explanation:

`"first,find circuit's current"`

`I=(Delta Q)/(Delta t)`

`I=40/5=8A`

`"now use power equation."`

`P=I^2*R`

`P:"Power"`

`I:"Current"`

`R:"Power"`

`16=8^2*R`

`16=64*R`

`R=cancel(16)/cancel(64)`

`R=1/4=0.25" "Omega`