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The magnetic field at the center of a circular loop of radius R carrying current I is:

  1. (a) μ₀ I/(2R)
  2. (b) μ₀ I/(4π R)
  3. (c) μ₀ I/R
  4. (d) μ₀ I/(2π R)
Answer and solution

Answer (a) μ₀ I/(2R)

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