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Question 20169
JEE Physics · Medium

Magnetism: Biot-Savart Law MCQ

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Biot-Savart LawMediumQuestion 20169

Question

The magnetic field at the centre of a circular loop of radius R carrying current I is:
  1. A
    μ₀I/2R
    Correct
  2. B
    μ₀I/4R
  3. C
    μ₀I/πR
  4. D
    μ₀IR

Correct answer

μ₀I/2R

Explanation

From Biot-Savart law, B = μ₀I/(2R) at the centre of a single circular loop.

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