Question

A charge of `2 C` passes through a circuit every `2 s`. If the circuit can generate `7 W` of power, what is the circuit's resistance?

Answer 1

Current(`I`) flowing through the circuit is `q/t` i.e `(2/2) A` or `1 A`

If power is `7` Watt,then from formula of power(`P=I^2 r`) we can write,

`7 = 1*r` (where r is the resistance of the circuit)

So,`r= 7 ohm`