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Wire on compass You place a long straight wire on top of your compass, and the wire is a height of 4 millimeters above the co

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Magnetic fieldi The magnetic field due to the straight wire is directly proportional to the current, permeability of free spaСИ ama Now, the earth magnetic field is Booth = 2x103T The angle deblected by the needle away from the north is given by Bwir

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