The two wires shown in the figure below are separated by d = 12.1 cm and carry c
ID: 1608849 • Letter: T
Question
The two wires shown in the figure below are separated by d = 12.1 cm and carry currents of I = 4.85 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, 12.1 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 = 24.2 cm to the left of the wire on the left.
magnitude T direction 2dExplanation / Answer
a)
here by using the formula
B = u0 * I / (2 * pie * r)
Bnet = - B1 - B2
Bnet = - [u0 * I1 / pie*d + u0 * I2/ pie*d ]
Bnet = [ (4 * 10^-7 * 4.85 ) / (0.121) + (4 * 10^-7 * 4.85) / (0.121)]
Bnet = 3.2 * 10^-5 T into the page
b)
Bnet = -B1 + B2
Bnet = - (u0 * I1) / (2 * pie * 2d) + (u0 * I2) / (2 * pie * d)
Bnet = [ - (4 * 10^-7 * 4.85 ) / (4 * 0.121) + (4 * 10^-7 * 4.85) / (2 * 0.121)]
Bnet = 4 * 10^-6 T out of the page
c)
Bnet = B1 - B2
Bnet = (u0 * I1) / (2 * pie * 2d) - (u0 * I2) / (2 * pie * 3d)
Bnet = [ (4 * 10^-7 * 4.85 ) / (4 * 0.121) - (4 * 10^-7 * 4.85) / (2 * 3 * 0.121)]
Bnet = 1.33 * 10^-6 T out of the page
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