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KCET2012PhysicsMagnetic Effects of Current

Magnetic field at a distance r from an infinitely long straight conductor carrying a steady current varies as

Options

  1. A1 r
  2. B1 r²
  3. C1 r
  4. D1 r³

Correct answer

C. 1 r

Step-by-step solution

We have B= ₀ 4 2 l r B 1 r

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