A long, straight wire perpendicular to this page carries a currentof 5.42 A dire

Question

A long, straight wire perpendicular to this page carries a currentof 5.42 A directed into thepage. Find the magnetic field at the following points,all 9.9 cm from the wire. (a) 9.9 cm to the left of the wire magnitude T direction ---Select---upwarddownwardrightleft
(b) 9.9 cm directly below the wire magnitude T direction ---Select---upwarddownwardrightleft
(c) 9.9 cm to the right of the wire magnitude T direction ---Select---upwarddownwardrightleft
(d) 9.9 cm directly above the wire magnitude T direction ---Select---upwarddownwardrightleft

(a) 9.9 cm to the left of the wire magnitude T direction ---Select---upwarddownwardrightleft
(b) 9.9 cm directly below the wire magnitude T direction ---Select---upwarddownwardrightleft
(c) 9.9 cm to the right of the wire magnitude T direction ---Select---upwarddownwardrightleft
(d) 9.9 cm directly above the wire magnitude T direction ---Select---upwarddownwardrightleft

magnitude T direction ---Select---upwarddownwardrightleft

Explanation / Answer

given that I = 5.42A r =9.9cm = 0.099m magnitude of magnetic field of wire = B =0I/2r where 0/2 = 2 * 10-7 plug in values B = -------T a) upward b) left c) down ward d) right plug in values B = -------T a) upward b) left c) down ward d) right

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