A coil of n number of turns wound tightly in the form of a spiral with inner and outer radii r 1 and r 2 respectively. When a current of strength I is passed through the coil, the magnetic field at its centre will be :

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JEE Main 2022 (Online) 30th June Morning Shift

MCQ+4 / -12022

A coil of n number of turns wound tightly in the form of a spiral with inner and outer radii r₁ and r₂ respectively. When a current of strength I is passed through the coil, the magnetic field at its centre will be :

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