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MHT CET202020 Oct 2020Morning ShiftPhysicsMagnetic Effects of CurrentActual

A straight wire carrying current 'I' is bent into a semi-circular arc of radius ^ r ^ , as shown. The magnitude of magnetic field at point '0' due to semi-circular arc is ( ₀= . Permeability of free space)

Options

  1. A₀ I 4 r
  2. B₀ I 2 r
  3. C₀ I r ²
  4. D₀ I r

Correct answer

A. ₀ I 4 r

Step-by-step solution

B= ₀ I 4 r

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