In the figure, four long straight wires are perpendicular to the page, and their

Question

In the figure, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 7.40 cm. Each wire carries 16.0 A, and all the currents are out of the page. What is the magnitude of the net magnetic force per unit length on wire 1?

In the figure, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 7.40 cm. Each wire carries 16.0 A, and all the currents are out of the page. What is the magnitude of the net magnetic force per unit length on wire 1?

Explanation / Answer

Refer to [1] for the relevant formulas. We'll figure out the force each of wires 2, 3 and 4 exerts on 1, and then add to obtain the total force. Pair 1-2: The wires carry the same current I in the same direction. Hence, the magnetic force between the two wires is attractive. It has magnitude ??I

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