Published by:
CGP EDU Academic Team
Published on: August 21, 2026
From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of magnetic field in the inside and outside region of the wire is
A
Uniform and remains constant for both the regions.
B
A linearly increasing function of distance upto the boundary of the wire and then linearly decreasing for the outside region.
C
A linearly increasing function of distance r upto the boundary of the wire and then decreasing one with 
dependence for the outside region.
dependence for the outside region.
D
A linearly decreasing function of distance upto the boundary of the wire and then a linearly increasing one for the outside region.
Text Solution
Verified by ExpertsThe correct answer is:
According to Ampere's law for a solid wire, the magnetic field intensity at some point inside
Whereas, magnetic field intensity at some point outside
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