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Edit View History Bookmarks People Window Help c Q www.webassign netweb/student/Assignment Responses/submit?dep 16052678 Vi -40V Ri My Notes o Ask your Teach O points Prevous Answers cUR 21 PO00 four wires are The drawing shows four insulated wires overlapping one another, forming a square with 0.050-m sides. All into the much longer than the sides of the square. The net magnetic field at the center of the square is 19.s uT, directed page. Calculate the current 49 BMy Notes Ask Your reach O 1M points t Previous Answers cug 22P019 lar loop of wire sides o.22 and o 38 m lies in a plane perpendicular to a constant magnetic field (see part a with of the drawing). The magnetic field has a magnitude of 0.61 T and is directed parallel to the normal of the loop's surface. In a time of o.17 s, one halr of the loop is then folded back onto the other half, as indicated in part b of the drawing

Explanation / Answer

here

Bnet = magnetic field = uoi/2pir due to each wire

r = 0.05/2 = 0.025 m

so

Bnet = (uo/2pir) *(i1+ i2 + i3+ i4)

(2 *10^ -7/0.025) *(3 + 7.3 + 4.4 + i) = 19.5*10^-6

i4 = i = 1.25 Amps

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