Two long parallel  wire  A and B  situated  perpendicuilar to the plane of the paper  at a distance
Channel: Doubtnut
Date: 2020-08-30

Two long parallel  wire  A and B  situated  perpendicuilar to the plane of the paper  at a distance  `2a` are carrying equal currents I in opposite  direction  as show in the figure  . The  value of  magnetic  induction at point  P situated at equal distance  r from  both  the wires will be