# 2-a-x-X

Question
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In the figure, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 17.0 cm. Each wire carries 7.00 A, and the currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3. In unit-vector notation, what is the net magnetic force per meter of wire length on wire 4?

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Step 1

According to question, four long wires perpendicular to the page have the same magnitude of current and their cross-section forms a square. The diagram is given below.

Step 2

According to a question in wires 1 and 4 current is flowing Force on wire 4 out of the Page and in wires 2 and 3 current is flowing into the page. The magnetic force per unit length on wire 4 in the magnetic field due to the rest of the wires is given by.

Step 3

In equation (1) I ,l and B are current flow through the wire, length of the wire and extern...

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