## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

$I_5 = 1$ Amp inward
We must use Kirchoff's junction law, $\Sigma I_{in} = \Sigma I_{out}$ The wires that have 6 and 2 amps are flowing outward, and the 3, 4, and unknown amp wires flow inward. $\therefore$ $3+4+I_5=6+2$ Since $I_5$ is positive, $I_5$ flows inward $I_5 = 1$ Amp