A current i is flowing in a straight conductor of length L. The magnetic induction at a…

Physics · JEE Advanced · NTA ExamsMagnetic Effects of Current and Magnetism

A current i is flowing in a straight conductor of length L. The magnetic induction at a point distant L/4 from its centre will be
  1. \(\frac{4 \mu_{0} \mathrm{i}}{\sqrt{5} \pi \mathrm{~L}}\)
  2. \(\frac{\mu_{0} \mathrm{i}}{2 \pi \mathrm{~L}}\)
  3. \(\frac{\mu_{0} \mathrm{i}}{\sqrt{2} \mathrm{~L}}\)
  4. Zero

Answer

(A) 4 _ 0 i 5 ~L

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