Verified Solution • 2025–26 Session
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QNEET-2022-Ph-435: NEET 2022 Physics - Class 12 NEET-2022-Ph-435 Solution: From Ampere's circuital law for a long straight wire of…
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 Uniform and remains constant for both the regions. A linearly increasing function of distance upto the boundary of the wire and then linearly decreasing for the outside region. A linearly increasing function of distance r upto the boundary of the wire and then decreasing one with dependence for the outside region. A linearly decreasing function of distance upto the boundary of the wire and then a linearly increasing one of the outside region.
Multiple Choice Options
- 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 r 1 _ dependence for the outside region.
- D A linearly decreasing function of distance upto the boundary of the wire and then a linearly increasing one of the outside region.
Step-by-Step Verified Solution
For solid wire
Inside point
B = _ 0 I r 2 R 2 _ 2 � r
= _ 0 I r R 2 _ 2 �
B _ r
Outside point
B = _ 0 I 2 � r
B _ 1 r