A long pair of insulated wires serves to conduct 24.5 A of dc current to and fro

Question

A long pair of insulated wires serves to conduct 24.5 A of dc current to and from an instrument. A third wire is placed in the plane of the two wires shown in (Figure 1) parallel and just to the right. If it carries 27.0 A upward, what force per meter of length does it exert on each of the other two wires? Assume it is 2.8mm from the nearest wire, center to center. Part A: Determine the force per meter exerted by the third wire on the right wire shown in the figure. answer: 4.7X10^-2 N/m Part B: Determine the direction of the force exerted by the third wire on the right wire shown in the figure. Answer: to the left or to the right????????

Explanation / Answer

F = uo*I1*I2/2pi*d

d =2.8 mm

I1 = 24.5 A

I2 = 27 A

F = 0.04725 N

part b )

towards left

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