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Two points, A and B, are at distances rA and rB from a long,

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Two points, A and B, are at distances rA and rB from a long, straight, current-carrying conductor. If rB = 2 rA, the magnitudes of the magnetic inductions at the two points are related by

(A) BA = BB 

(B) BA = 2BB 

(C) BA = 4BB 

(D) BB = 2BA

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1 Answer

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by (32.7k points)

(B) BA = 2BB 

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