Bhautik Study

Question. From Amperes circuital law for a long straight wire of circular crosssection carrying a steady current, the variation of the magnetic field in the inside and outside region of the wire is

(1) Uniform and remains constant for both the regions.

(2) A linearly increasing function of distance up to the boundary of the wire and then linearly decreasing for the outside region.

(3) A linearly increasing function of distance r up to the boundary of the wire and then decreasing one with 1/r dependence for the outside region.

(4) A linearly decreasing function of distance up to the boundary of the wire and then a linearly increasing one for the outside region.                                                                                                                                                                                                 (NEET-2022)