NEET Questions Solved


A part of a long wire carrying a current i is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is

                         

(a) μ0i4r                                 (c) μ0i2πrπ+1

(b) μ0i2r                                 (d) μ0i2πrπ-1

(c) The given circuit can be considered as follows

         

Bloop=μ0i2r

Bconductor=μ0i2πr

Bnet=μ0i2πrπ+1

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