An electron moving in a circular orbit of radius $r$ makes $n$ rotation per second. The magnetic field produced at the centre has a magnitude of
An electron moving in a circular orbit of radius $r$ makes $n$ rotation per second. The magnetic field produced at the centre has a magnitude of
- A
$\frac{{{\mu _0}ne}}{{2r}}$
- B
$\frac{{{\mu _0}{n^2}e}}{{2r}}$
- C
$\frac{{{\mu _0}ne}}{{2\pi r}}$
- D
Zero
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