A thin ring of radius R metre has charge q coulomb uniformly spread on it. The ring…
Physics · Class 12 · CBSE — Moving Charges and Magnetism
A thin ring of radius R metre 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:
- \(\frac{\mu_{0} q f}{2 R}\)
- \(\frac{\mu_{0} q f}{2 \pi R}\)
- \(\frac{\mu_{0} q}{2 \pi f R}\)
- \(\frac{\mu_{0} q}{2 f R}\)
Answer
(A) _ 0 q f 2 R
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