Part A Three long parallel wires are 3.8 cm from one another (Looking along them

Question

Part A Three long parallel wires are 3.8 cm from one another (Looking along them, they are at three corners of an equilateral triangle.) The current in each wire is 7.70 A but its direction in wire M is opposite to that in wires N and P (see the figure (Fiqure 1)). Determine the magnitude of the magnetic force per unit length on wire M due to the other two. Express your answer using two significant figures M net Figure 1 of 1 Submit My Answers Give Up Part B Determine the angle of the magnetic force per unit length on wire M due to the other two Express your answer using two significant figures 3.8 cm counterclockwise Submit My Answers Give Up

Explanation / Answer

part A) F/L = uo i1i2 / 2 pi r = [4pi * e-7 x 7.7*(7.7) / [2 * pi *0.038]] * sqrt(2+2cos60 degree) = 0.00054049 N /m

The force is repulsive.

Part b)90 degree

because of symmetry, the force due to both wires will act upward

F/L= [ 4pi * 10^-7 x 7.7*(7.7) / [2 * pi *0.038]] * sqrt(2+2cos120 degree) = 0.0003120 N /m

PART d) because of symmetry, angle will be -60o, so 300 degree counterclockwise

300 degree counterclockwise

part e) similar to wire N,

F/L=  [ 4pi * 10^-7 x 7.7*(7.7) / [2 * pi *0.038]] * sqrt(2+2cos120 degree) =0.0003120N /m

part f)

because of symmetry, angle will be -120o, so 240 degree counterclockwise

240 degree counterclockwise

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