JEE Advanced 2024 Physics question
An infinitely long wire, located on the -axis, carries a current along the -direction and produces the magnetic field . The magnitude of the line integral along a straight line from the point to is given by [ is the magnetic permeability of free space.]
Answer: (A)
Solution
, so and the integral depends only on the change of the azimuthal angle (the path does not cross the wire). Start:
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