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

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🧑‍🏫 Author: Aditya Bhatt Sir   |   🕒 Last Updated: July 13, 2025

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📘Question

Consider a long straight wire of a circular cross-section radius a carrying a steady current I.The current is uniformly distributed across this
cross-section. The distances from the centre of the wire’s cross-section at which the magnetic field [inside the wire, outside the wire] is half of the maximum possible magnetic field, any where due to the wire, will be

                                                                (JEE-2025)

✅ Answer

Consider a long straight wire of a circular cross-section (radius a) carrying a steady current I. The current is uniformly distributed across this cross-section. The distances from the centre of the wire's cross-section at which the magnetic field [inside the wire, outside the wire] is half of the maximum possible magnetic field, any where due to the wire, will be

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