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13 A circular coiil carrying a certain current produces a magnetic field Bo at its centre. The coil is now rewoundso as to have 3 turns and the same current is passed through it. The new magnetic field at the centre is

Answer» 13 A circular coiil carrying a certain current produces a magnetic field Bo at its centre. The coil is now rewoundso as to have 3 turns and the same current is passed through it. The new magnetic field at the centre is


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