Physics

Problem

Two nodes A and B are connected by a branch carrying current

I_2

from A to B. At node A, a current

I_1=7\,\text{A}

enters, and a current of

2\,\text{A}

leaves through another branch to ground. At node B, a current

I_3=3\,\text{A}

enters, and a current

I_4=8\,\text{A}

leaves to ground. The magnitude and direction of

I_2

are a)

5\,\text{A}

from B to A b)

9\,\text{A}

from A to B c)

5\,\text{A}

from A to B d)

1\,\text{A}

from A to B