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JEE Main202524 Jan 2025Evening ShiftPhysicsMagnetic Effects of CurrentActual

A long straight wire of a circular cross-section with radius ' a ' carries a steady current I . The current I is uniformly distributed across this cross-section. The plot of magnitude of magnetic field B with distance r from the centre of the wire is given by

Correct answer

3

Step-by-step solution

We know inside the wire array ll B= ₀ I 2 R^2 r & (O

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