Question

021 10.0 points Assume the wire visible in the plane is bent perpendicularly at A and at C, with the re- mainder of the wire behind the paper. A cur- rent of 7.5 A flows toward you at A, through the visible portion, and back in the opposite direction at C. Consider the wires below the plane at A and C to be semi-infinite. 5 m +7.5 A 7.5 A- 8 m- .7.5 A 8 m What is the magnitude of the magnetic field

Answer 1

let's consider the co-ordinate axis shown below D Z so at point is and A current point 'c' current at in ta direction in -2 direction. is

general ralue at Now, the of magnetic field perpendicular distance cy) from a semi- infinite wire is given by B = Vo and the 4118 direction as obtained curling the fingers . filler right hand thumb rule, B C B 5m d = 13m B room 2 qm let d₂=16m AAI is Wire out into the col is of the plane plane, B BIT Wire 13 BAA BD + Boct Bec + ABI " Bnet at o =

B AA Hoi 411di 1.25 664 X 10 x 75 BAA! e) 4 1 X 13 BAA' = 0.058 x 10 bit B bed Hoi ( 411d₂ -6 1.2566 4 x 10 x 7.5 Bcd 4T X 16 Bed = -6 0.039 x 10 (+) -

Zero Magnetic field because of of AB 8 DC Nires at point 'o is because if we extend these they pass through pointa which results from to the Wires in perpendicular distance point o is Zero Wire . 8 B Do ABI circular is. Now, part BD circular part of angle B at centre of centre is o at B Moi (0) hº BD ATZ 1/2 Hore Hoi (-Ê BO 87

B 1.25664 x 75 Blo (-k) .8 x 8 B BID = -0.167810 TK Directron fingers in obtained by curling the the direction of current coil. along the Bret 6 A 0.058810 ? +0.0398100 ĵ -0.14781687 1 Bnet - 100 10.058)² + + 10.03972+(-0.147)? (Bretl = 10:026uau x 10 Tesla IBnetl 0.163 8106 T is Magnetic field at Tesla, 1.63 x 10 -5