The two wires shown in the figure below are separated by d = 9.7 cm and carry cu
ID: 2180959 • Letter: T
Question
The two wires shown in the figure below are separated by d = 9.7 cm and carry currents of I = 4.65 A in opposite directions.
(a) Find the magnitude and direction of the net magnetic field at a point midway between the wires. magnitude______ ?T
direction
(b) Find the magnitude and direction of the net magnetic field at point P1, 9.7 cm to the right of the wire on the right.
magnitude_____ ?T
direction
(c) Find the magnitude and direction of the net magnetic field at point P2, 2d = 19.4 cm to the left of the wire on the left.
magnitude______ ?T
direction
Explanation / Answer
If the currents are in the same direction, then the force in the wires will be attractive. Force / L= Uo*I*I' / 2pi*d d = distance between the wires I and I' = currents Uo = 4pi*10^-7 Force / L= 4pi*10^-7*8*12 / 2pi*0.4*10^-2 Force / L= 4.8*10^-3 Newton/ meters and since the current is in the same direction, this force is attractive.
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