Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A long straight wire with a circular cross-section having radius 
, is carrying a steady current 
. The current 
is uniformly distributed across this cross-section. Then the variation of magnetic field due to current I with distance 
from its centre will be:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Use Ampere's law
B. 
Thus 
──────────────────────────────────────────────────────────────────────────────────────────
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
PART-I PHYSICS
SECTION-A
If , then the relative error in will be:
is a vector quantity such that nonzero constant. Which of the following expressions is true for ?
Which of the following relations is true for two- unit vectors and making an angle to each other?
If force acts on a particle having position vector then, the torque about the origin will be:-
The height of any point above the surface of earth is equal to diameter of earth. The value of acc…
The terminal velocity of the spherical rain drop depends on the radius (r) of the spherical rain d…