A) Zero
B) \[\frac{{{\mu }_{0}}{{n}^{2}}e}{r}\]
C) \[\frac{{{\mu }_{0}}ne}{2r}\]
D) \[\frac{{{\mu }_{0}}ne}{2\pi r}\]
Correct Answer: C
Solution :
[c] Radius of circular orbit = r No. of rotations per second = n i.e., \[T=\frac{1}{n}\] Magnetic field at its centre, \[{{B}_{c}}=?\] As we know, current \[i=\frac{e}{T}=\frac{e}{(1/n)}=en=\] equivalent current Magnetic field at the centre of circular orbit, \[{{B}_{c}}=\frac{{{\mu }_{0}}i}{2r}=\frac{{{\mu }_{0}}ne}{2r}.\]You need to login to perform this action.
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