A thin ring of radius R metre has charge q coulomb uniformly spread on it. The ring…

Physics · JEE Main · NTA Exams — Magnetic Effects of Current and Magnetism

1. \(\frac{\mu_{a} q^{f}}{2 \pi R}\)
2. \(\frac{\mu_{a} q}{2 \pi f R}\)
3. \(\frac{\mu_{\mathrm{ag}}}{2 \mathrm{fR}}\)
4. \(\frac{\mu_{n} q f}{Z R}\)

Answer

(D) _ n q f Z R

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