Published by:
CGP EDU Academic Team
Published on: August 21, 2026
A very long cylindrical wire is carrying a current 
distributed uniformly over its cross-section area. 
is the centre of the cross-section of the wire and the direction of current is into the plane of the figure. The value of 
along the path 
(from 
to 
) is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
According to Ampere's circuital law
∵ Current enclosed in 
or 
circular loop is 
∴ Current enclosed in 
or 
area is 
For the closed path 
by the Ampere's law
Since the magnetic field is perpendicular to the paths 
and 
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