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NEET2012PhysicsMagnetic Effects of CurrentActual

A toroid with mean radius r₀ , diameter 2 a have N turns carrying current I . What is the magnetic field B inside the toroid?

Options

  1. AN I 2 r₀
  2. BN I 2 (r₀+a )
  3. CN I (r₀+a )
  4. Dzero

Correct answer

D. zero

Step-by-step solution

: The magnetic field at any point inside the toroid is zero

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