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  • A thin ring of radius R meter has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolutions/s. The value of magnetic induction in Wb/m

A thin ring of radius R meter has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolutions/s. The value of magnetic induction in Wb/m2 at the centre of the ring is

Option: 1

\frac{\mu_{0}\text{qf}}{2\text{R}}


Option: 2

\frac{\mu_{0}\text{qf}}{2\pi\text{R}}


Option: 3

\frac{\mu_{0}\text{q}}{2\pi\text{fR}}


Option: 4

\frac{\mu_{0}\text{q}}{2\text{fR}}


Answers (1)

best_answer

\mathrm{B}=\frac{\mu_0 \mathrm{I}}{2 \mathrm{R}}=\frac{\mu_0}{2 \mathrm{R}}\left(\frac{\mathrm{q}}{\mathrm{t}}\right)=\frac{\mu_0 \mathrm{qf}}{2 \mathrm{R}}

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manish

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