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A wire of length I is bent in the form of an equilateral triangle and carries an electric currrent i.

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A wire of length I is bent in the form of an equilateral triangle and carries an electric currrent 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?

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(a) ΔABC is Equilateral

AB = BC = CA = ℓ/3

Current = i

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