JEE Mains 6-Apr-2023 Shift 1 Solved Paper

Section: Physics

Question : 39 of 90

Marks: +1, -0

A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed across this cross-section. The magnetic field is

[6-Apr-2023 shift 1]

zero in the region r<a and inversely proportional to r in the region r>a
inversely proportional to r in the region r<a and uniform throughout in the region r>a
directly proportional to r in the region r<a and inversely proportional to r in the region r>a
uniform in the region r<a and inversely proportional to distance r from the axis, in the region r>a

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