Question

A charge of `15 C` passes through a circuit every `12 s`. If the circuit can generate `14 W` of power, what is the circuit's resistance?

Answer 1

`R=8,96 " Ohm"`

Explanation:

`"first ; we must find the electric current:"`
`"I=Electric current"`
`Delta Q":charge"`
`Delta "t:time"`
`I=(Delta Q)/(Delta t)`
`I=15/12=5/4" A"`
`P:Power`
`"R:Resistance of circuit"`
`"The Electric power is given as formula:"`
`P=I^2*R`
`14=(5/4)^2*R`
`14=25/16*R`
`R=(14*16)/25`
`R=8,96 " Ohm"`