Question

let `B` be the magnetic field at a point between the two conductors, at a distance `x` from the axis. Let `B_(2)` be the magnetic field at a point outside conductor, at a distance `2x` from the axis
A. `B_(1)=B_(2)`
B. `B_(1)=2B_(2)`
C. `B_(2)=2B_(1)`
D. `B_(2)=4B_(1)`

Answer 1

Correct Answer - A
`B_(1)=(mu_(0)I)/(2pix), B_(2)=(mu_(0)(2I))/(2pi(2x))=(mu_(0)I)/(2pix)`
`B_(1)=B_(2)`