Question 2: A current I flows in a thin wire, shaped as regular polygon of n sides which can be
inscribed in a circle of radius R. The magnetic field induction at the centre of polygon due to
one side of the polygon is :-
\[tan\frac{\pi}{n} tesla\]
\[\frac{\mu_{0}I}{\pi R}\left[ tan\frac{\pi}{n} \right] tesla\]
\[\frac{\mu_{0}I}{2\pi R}\left[ tan\frac{\pi}{n} \right] tesla\]
\[\frac{\mu_{0}I}{2\pi R}\left[ cos\frac{\pi}{n} \right]\]
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