Question

The four wires from a larger circuit intersect at junction A
as shown. What is the magnitude and direction of the
current between points A and B ?
(a) 2 A from A to B (b) 2A from B to A
(c) 3A from A to B (d) 2A from B to A

Answer 1

Explanation:

Kirchhoff's junction rule states that the algebraic sum of all currents into and out of branch point is zero i.e,ΣI=0. By convention, the sign of current entering a junction is positive and current leaving a junction is negative.

Thus, at junction A, 4+5−6=3A. It is positive so the current 3A will flow from A to B.

Answer 2

Answer:

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