Questions
Find the magnetic field at the point P in figure. The curved portion is a semicircle and the straight wires are long
detailed solution
Correct option is A
The magnetic field at P due to any current element in the figure is perpendicular to the plane of the figure and coming out of it. The field due to the upper straight wire is
Same is the field B2 due to the lower straight wire. The field due to the semicircle of radius (d/2) is
The net field is
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