Question

A wire bent in the shape of a regular n polygonal loop carries a steady current I. Let l be the perpendicular distance of a given segment and R be the distance of a vertex, both from the centre of the loop. The magnitude of the magnetic field at the centre of the loop is given by.

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

$B=\frac{{\mu }_{0}I}{4\pi l}\times 2sin\theta where2\theta =\frac{2\pi }{n}$