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PhysicsNEET 2022Biot–Savart and Ampère's laws

Moving Charges and Magnetism

From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of the magnetic field in the inside and outside regions of the wire is:

  1. A.A linearly decreasing function of distance up to the boundary of the wire and then a linearly increasing one for the outside region
  2. B.Uniform and remains constant for both the regions
  3. C.A linearly increasing function of distance up to the boundary of the wire and then linearly decreasing for the outside region
  4. D.A linearly increasing function of distance up to the boundary of the wire and then a decreasing one with dependence for the outside region✓

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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