A long conducting wire having a current I flowing through it, is bent into a circular coil of N turns. Then it is bent into a circular coil of n turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is:

Magnetic Effects of Current and Magnetism: JEE Main 2023 Physics question

JEE Main 2023 · 31 Jan, Evening shift · Q7691

JEE Main 202331 Jan, Evening shiftPhysicsMediumMagnetic Effects of Current and Magnetism165× since 2002

A long conducting wire having a current I flowing through it, is bent into a circular coil of

\mathrm{N}

turns. Then it is bent into a circular coil of

\mathrm{n}

turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is :

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JEE Main 2023 Magnetic Effects of Current and Magnetism Question with Solution (31 Jan Evening shift, Q7691) | JEE Arc