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The magnetic field produced by a current-carrying straight wire at a point outside the wire depends

Options

  1. Ainversely on the distance from it
  2. Bdirectly on the distance from it
  3. Cinversely at short distances and directly at large distances from it
  4. Ddirectly on the distance (at short distances) and inversely on the distance (at long distances) from it

Correct answer

A. inversely on the distance from it

Step-by-step solution

By Biot - Savart's law B = ₀ i 2 r So, B 1

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