alleryMagnetic field at center of a circular loop of radius R carrying current I:
Aμ₀I / (2πR)
Bμ₀I / (2R)
Cμ₀I / (4πR)
Dμ₀ I R
Answer & Solution
Correct answer: B. μ₀I / (2R)
B = μ₀I / (2R) at center of circular loop.
**For N turns:** B = μ₀NI / (2R).
Direction along axis by right-hand rule.
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