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A circular coil of a certain current produces a magnetic field B0 at its centre. The coil is rewound so as to have 3 turns and the same current is passed through it. What is the new magnetic field at the centre? |
| Answer» A circular coil of a certain current produces a magnetic field B0 at its centre. The coil is rewound so as to have 3 turns and the same current is passed through it. What is the new magnetic field at the centre? | |