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I1
Two long, straight wires carry currents in the directions shown in the figure above. I1 = 2 A, 12 = 10 A, a = 8 cm, b = 2 cm.
a) Find the magnetic field strength at point P.
B = (
i+
j)T
b) What force would 1 m of a third wire, carry a 4-A current out of the page, experience if place at P?
F = (
i+
j)N

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