11http://targetiit.com/iit_jee_forum/posts/highly_conceptual_2457.html
Why cannot we use the ampere's circuital law while finding the magnetic field of a wire of finite length? Though we can very easily use it when the wire is of infinite length.
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6 Answers
3i think the magnetic field shud be like this
and the field is not uniform
the magnetic induction is not constant and so we cant find the magnetic induction by using ampere's law
24sanky it was already answered in that post ........go to link as given in post#2
6yeah this is true because of the phenomenon called fringing of magnetic field!