A piece of wire carrying a current of 6.00A is bent in the form of a circular Eire of radius 10.0cm, and it subtends an angle of 120° at the centre. Find the magnetic field B due to this piece of wire at the centre.
= 4 × 3.14 × 10–6 = 12.56 × 10–6 = 1.26 × 10–5T
