Question

A charge of `24 C` passes through a circuit every `2 s`. If the circuit can generate `8 W` of power, what is the circuit's resistance?

Answer 1

`R= 1/18 Omega`

Explanation:

First of all calculate the current, then use the power equation to calculate the resistance.

Current `I = 24/2 = 12 C/s` or `12 Amp`

`P=I^2R` where `P` is the power, `I` is the current and `R` is the resistance.

`8 = 12^2R`
`R=8/144 = 1/18 Omega`