Physics Asked by Debakant on January 11, 2021
Can Amperian loop be taken parallel to current. I.e suppose current is in a circular loop in xy plane. And let the screen you are watching is xy plane . Can we take amperian loop in the same plane.
And find out magnetic field at a point .
You could, but unclear how this helps you. Ampere's law would, in this case, tell you that $$ oint vec{B}cdot dvec{l} = 0 ,$$ because you have no current flowing through the closed loop.
I suppose it does tell you there isn't a toroidal field aligned with the Amperian loop.
Answered by ProfRob on January 11, 2021
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