NEET2021Physics-Magnetism
NEET 2021 Physics Magnetic Field due to Current MCQ Question
Type: MCQ-conceptual-Medium-Class 12
A thick current carrying cable of radius 'R' carries current 'I' uniformly distributed across its cross-section. The variation of magnetic field B(r) due to the cable with the distance 'r' from the axis of the cable is represented by :
B
Diagram 2
C
Diagram 3
D
Diagram 4
Correct Answer
Option C
Detailed Explanation
Inside the cable, the magnetic field increases linearly with distance from the center, reaching a maximum at the surface, and then decreases inversely with distance outside the cable.
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