If a current of $2 A$ $2 A$ passing through a circuit generates $15 W$ $15 W$ of power, what is the resistance of the circuit?

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Answer 1 · 2016-01-30T13:39:24

Assuming that the resistors are connected in series, the effective resistance is $3.75 Omega$ .

$P = VI$

Since by Ohm's Law, $V=IR$ ,
$P = I^2R$ .

$15W=(2"A")^2R_{"eff"}$

$R_{"eff"} = 15/4 Omega$

If a current of 2 A2A2 A passing through a circuit generates 15 W15W15 W of power, what is the resistance of the circuit?