The two wires shown in the figure below are separated by d = 11.1 cm and carry c

Question

The two wires shown in the figure below are separated by d = 11.1 cm and carry currents of I = 5.20 A in opposite directions. Find the magnitude and direction of the net magnetic field at a point midway between the wires. magnitude _______________ mu T direction Find the magnitude and direction of the net magnetic field at point P_1, 11.1 cm to the right of the wire on the right. magnitude _______________ mu T direction Find the magnitude and direction of the net magnetic field at point P_2, 2d = 22.2 cm to the left of the wire on the left. magnitude _______________ mu T direction

Explanation / Answer

B = 2*(o*I/2r) = (but o/2 = 2.0X10^-7)

so B = 2*2.0x10^-7*5.20/(0.1110/2) = 3.74x10^-5 T (IN)

b) Here the left wire creates a field into the page and the right wire is out

so the net field will be IN

B = o/2*(I1/0.1110 - I2/(0.1110 + 0.1110)) = 2.0x10^-7*(5.20/0.0967 - 5.20/(0.2220) =

= 4.68x10^-6 T IN

c) Now the net field will be OUT

B = o/2*(I1/0.2220 - I2/(0.1110 + 0.2220)) = 2.0x10^-7*(5.20/0.2220 - 5.20/(0.3330) =

= 1.56x10^-6 T OUT

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