Calculate the magnetic field (magnitude and direction) at a point P due to a current I = 12.0 A in the wire shown in Fig. P28.68. Segment BC is an arc of a circle with radius 30.0 cm, and point P is at the center of curvature of the arc. Segment DA is an arc of a circle with radius 20.0 cm, and point P is at its center of curvature. Segments CD and AB are straight lines of length 10.0 cm each.

Q:Calculate the magnetic field (magnitude and direction) at a point P due to a current I =12.0 A in the wire shown in Fig. P28.68.Segment BC is an arc of a circle with radius 30.0 cm, and point P is at the center ofcurvature of the arc. Segment DA is an arc of a circle with radius 20.0 cm, and point P is atits center of curvature. Segments CD and AB are straight lines of length 10.0 cm each. Step by Step SolutionStep 1 of 4We are asked to find the magnetic field and direction at point P due to current I=12A flowingthrough the wire.The problem could be solved with little bit of intuition and knowledge of right hand thumb rule.Given data:Radius of arc BC=Radius of arc DA=Current=12ABoth arcs DA and BC subtends an angle 120 degrees at point P. Thus, wire segment BC and DAcould be visualised as one third of a circular wire.