Question

How does the strength of magnetic field produced at the center of the loop be affected if: -  

(a) Strength of the current passing through it is doubled? 


(b) The radius of the loop is reduced to half the original value? 


(c) The radius of the loop is doubled its original value and at the same time current passing through it is also doubled? 


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Answer 1

by strenghtning the current passing through it is doubled.