The long, straight wire AB shown in the following figure carries a current of I
ID: 1376799 • Letter: T
Question
The long, straight wire AB shown in the following figure carries a current of I1 = 11.5 A. The rectangular loop whose long edges are parallel to the wire carries a current of I2 = 2.85 A. Find the magnitude and direction of the net force exerted on the loop by the magnetic field of the wire.
1) magnitude -----? T direction away from the wire, toward the wire, The net force on the loop is zero. The long, straight wire AB shown in the following figure carries a current of I1 = 11.5 A. The rectangular loop whose long edges are parallel to the wire carries a current of I2 = 2.85 A. Find the magnitude and direction of the net force exerted on the loop by the magnetic field of the wire. 1) magnitude -----? direction away from the wire, toward the wire, The net force on the loop is zero.Explanation / Answer
Only the parallel portions of the loop will be acted upon by a force. The perpendicular portions will not play a part.
The formula to apply if F = uIIL/2pir for each wire segment. The top segement will be attracted and the bottom repelled due to the direction of the currents
Thus...
F = (4pi X 10-7)(11.5)(2.85)(.2)/(2pi)(.026) - (4pi X 10-7)(11.5)(2.85)(.2)/(2pi)(.1)
F = 3.73 X 10-5 N upward toward the wire
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