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
Answer:B
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