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NEET2010PhysicsElectromagnetic InductionActual

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 revolution/s. The value of magnetic induction in Wb m ⁻² at the centre of the ring is

Options

  1. A₀ q f 2 R
  2. B₀ q 2 f R
  3. C₀ q 2 f f
  4. D₀ q f 2 R

Correct answer

D. ₀ q f 2 R

Step-by-step solution

The magnetic field at the centre of the circle (B= ₀ I 2 R = ₀ 2 R ( q t )= ₀ q f 2 R )

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