Physics

Problem

At a junction P, currents of

2\,\text{A}

and

3\,\text{A}

flow into the junction, while a current of

1\,\text{A}

flows out. What is the magnitude and direction of the fourth branch current

I

? a)

6\,\text{A}

flowing out of P b)

4\,\text{A}

flowing out of P c)

4\,\text{A}

flowing into P d)

0\,\text{A}

(no current)