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NEET2011PhysicsMagnetic Effects of CurrentActual

Charge q is uniformly spread on a thin ring of radius R . The ring rotates about its axis with a uniform frequency f ~Hz . The magnitude of magnetic induction 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 R
  4. D₀ q f 2 R

Correct answer

A. ₀ q f 2 R

Step-by-step solution

We know array ll B= ₀ i 2 R q=i t i= q t =q f [ f= 1 t ] B= ₀ q f 2 R array

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