The two wires shown in the figure below are separated by magnitude ?T direction

Question

The two wires shown in the figure below are separated by

magnitude ?T direction
The two wires shown in the figure below are separated by d = 10.7 cm and carry currents of I = 4.80 A in opposite directions. (a) Find the magnitude and direction of the net magnetic field at a point midway between the wires. (b) Find the magnitude and direction of the net magnetic field at point P1, 10.7 cm to the right of the wire on the right. (c) Find the magnitude and direction of the net magnetic field at point P2, 2d = 21.4 cm to the left of the wire on the left.

Explanation / Answer

I = 4.80 A, d = 10.7 cm
(a) Find the magnitude and direction of the net magnetic field at a point midway between the wires.
magnitude B = 0I/(2*d/2) + 0I/(2*d/2) = 0I/(d) = 1.79*10-5 T = 17.9 T

direction: into the page

(b) Find the magnitude and direction of the net magnetic field at point P1,10.7 cm to the right of the wire on the right.

(c) Find the magnitude and direction of the net magnetic field at point P2,2d = 21.4 cm to the left of the wire on the left.

magnitude B = 0I/(2*d) - 0I/(2*2d) = 0I/(4d) = 4.49*10-6  µT = 4.49 T direction: out of the page

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