The two wires shown in the figure below are separated by d = 12.3 cm and carry c

Question

The two wires shown in the figure below are separated by d = 12.3 cm and carry currents of I = 5.15 A in opposite directions (a) Find the magnitude and direction of the net magnetic field at a point midway between the wires. magnitude _____ (b) Find the magnitude and direction of the net magnetic field at point P_1 12.3 cm to the right of the wire on the right. magnitude _____. mu T direction out of the page (c) Find the magnitude and direction of the net magnetic field at point P_2, 2d = 24.6 cm to the left of the wire on the left. magnitude _____ mu T direction out of the page

Explanation / Answer

a) B = -B1-B2 = -mue0/2pid/2(i1+i2)

B = -4*10^-7/0.123(5.15+5.15) = 334.9*10^-7 T into the page = 33.5*10^-6 T

b) B = -B1+B2 = mue0*i/2pi(-1/2d+1/d) = mueo*i/4pid = 4.19*10^-6 T out of the page

c) B = B1-B2 = mue0*i/2pi(1/2d-1/3d) = 1.397*10^-6 T out of the page

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