Two wires each carry 57.6 A of current (in opposite directions ) and are 3.0 mm

Question

Two wires each carry 57.6 A of current (in opposite directions) and are 3.0 mm apart (see the figure below). Calculate the magnetic field 25 cm away at point P, in the plane of the wires, if the currents instead both run to the left.

Magnitude:           T

Direction: out of the page

Two wires each carry 57.6 A of current (in opposite directions) and are 3.0 mm apart (see the figure below). Calculate the magnetic field 25 cm away at point P, in the plane of the wires, if the currents instead both run to the left. Magnitude: T Direction: out of the page

Explanation / Answer

For one wire, Field = 2*10^-7 * i/r

For two wires, B = 2*10^-7 * 57.6 *(1/0.25 + 1/0.253)

= 9.16*10^-5 T

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