Question
Wed September 11, 2013 By: Rhea Babu

What is the magnitude of magnetic field at the centre of a circular wire, if the radius of the circular wire is 1 m and the current is 20 A.?

Expert Reply
Thu September 12, 2013
B= moI/ 2pi R
=  4x pi x 10 -7 x 20/2 x pi x 1
=4 x 10-6 T
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