Physics-
General
Easy
Question
In the adjacent figure is shown a closed path 
A long straight conductor carrying a current 
passes through 
and perpendicular to the plane of the paper. Then which of the following holds good?
- None of these
The correct answer is:
A long straight conductor carrying current passes through 
then by symmetry, all points of the circular path are equivalent and hence the magnitude of magnetic field should be same at these points.
The circulation of magnetic field along the circle is
(using Ampere’s law)
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