In the figure shown the magnetic field at the point P is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
The conductor forms two concentric semicircles and two straight wires. Find magnetic field at the center P due to concentric arcs by formula 
, and fields due to straight wires by formula 
and then add the fields due to individual parts.
Consider the figure.
where 
(Semi-infinite wire)
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