Question: Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field

Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field B1, at its centre when a current I passes through it. The second wire is bent into a coil with three identical loops adjacent to each other and produces magnetic field B2 at the centre of the loops The ratio B1: B2 is

(a) 1:1

(b) 1:3

(d) 9:1

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