Question Detail
Question
Answer saved Four wires meet at a junction. The first carries 4 A into the junction, the second carries 5 A out of the junction, and the third carries 2 A out of the junction. The fourth carries:
Correct Answer
Option A is the correct answer.
Detailed Explanation
KCL: sum in = sum out. In = 4 + I₄. Out = 5+2=7. So 4+I₄=7 → I₄=3 A into junction.
Hint
ΣI_in = ΣI_out.