A wire of length l is bent in the form of an equilateral triangle and carries an electric current i.
Channel: Doubtnut
Date: 2020-07-05

A wire of length l is bent in the form of an equilateral triangle and carries an electric current i. (a) Find the magnetic field B at the centre. (b) If the wire is bent in the form of a square, what would be the value of B at the centre?