1.

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

Answer»

`B_(1)=B_(2)`
`B_(1)=2B_(2)`
`B_(2)=2B_(1)`
`B_(2)=4B_(1)`

SOLUTION :`B_(1)=(mu_(0)I)/(2pix), B_(2)=(mu_(0)(2I))/(2pi(2x))=(mu_(0)I)/(2pix)`
`B_(1)=B_(2)`


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