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An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude

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An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude

(a) zero

(b) μ0ne/2πr

(c) μ0ne/2r

(b) μ0n2e/2r

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1 Answer

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Correct Answer is: (c) μ0ne/2r

The charge flowing past any point on the orbital path per second is ne. This is the equivalent orbital current.

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