A toroid has core non ferromagnetic inner radius 20 cm and outer radius 30 cm around which 3000 turns of a wire are wound If

Question

A toroid has core non ferromagnetic inner radius 20 cm and outer radius 30 cm around which 3000 turns of a wire are wound If current in the wire is 10 A Then magnetic field at distance 5 cm from inner radius inside the core of the toroid will be 1 12 mT 3 6 mT 2 18 mT 4 24 mT

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