Chapter 21, Problem 59 Two long, straight wires are separated by 0.120 m. The wi

Question

Chapter 21, Problem 59

Two long, straight wires are separated by 0.120 m. The wires carry currents of 7.1 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the points labeled (a) A and (b) B.

Your answer is partially correct. Try again. Chapter 21, Problem 59 Two long, straight wires are separated by 0.120 m. The wires carry currents of 7.1 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the points labeled (a) A and (b) B.

Explanation / Answer

a) B1 = (10^-7)(2*7.1)[1/0.03 - 1/0.15] = 3.787*10^-5 T (coming out of the plane of figure)

(b) B2 = (10^-7)(2*7.1)[1/0.06 + 1/0.06] = 4.734*10^-5 T (going into the plane of the figure)

Formula Used B = (mu/4*pi)*[2I/r],
where mu = magnetic permeability of free space= 4*pi*10^-7 H m^-1; I is current in teh long straight conductor and r is perpendicular distance.

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