A charge of $15 C$ passes through a circuit every $12 s$ . If the circuit can generate $6 W$ of power, what is the circuit's resistance?

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Answer 1 · 2016-05-05T01:30:49

I found: $3.84Omega$

The current will be:
$I=q/t=15/12=1.25A$

The power is:

$P=VI=I^2R$ (using Ohm's Law $V=RI$ )

so:

$R=P/I^2=6/(1.25)^2=3.84Omega$

A charge of 15 C15 C passes through a circuit every 12 s12 s. If the circuit can generate 6 W6 W of power, what is the circuit's resistance?