A current of 1 . 5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of the triangle is : (Assume that the current is flowing in the clockwise direction.)

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B 1 = μ 0 I 4 π R 2 sin 60 = 4 π × 10 - 7 × 1 . 5 4 π . 3 3 2 × 10 - 2 × 2 × 3 2 = 1 × 10 - 5 B n e t = 3 B 1 = 3 × 10 - 5 T ⊗

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