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25 Jun 2023
Class 12 | Moving Charge and Magnetism | A long insulated copper wire is closely wound as a spiral of 'N' turns. The spiral has inner radius ' a' and outer radius ′ b ′ . The spiral lies in the X−Y plane and a steady current 'I' flows through the wire. The Z-component of the magnetic field at the center of the spiral is :
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