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    Question

    A toroid has a core (non-ferromagnetic) of inner radius

    23 cm and outer radius 28 cm, around which 4000 turns of a wire are wound. If the current in the wire is 9 A, find the magnetic field (a) inside the core of the toroid (b) outside the toroid?
    A 2.82.0 ├Ч 10^-2 T (b) 0 Correct Answer Incorrect Answer
    B (a)3.0 ├Ч 10^-2 T (b) 0.5 Correct Answer Incorrect Answer
    C (a) 28.2 T (b) 0 Correct Answer Incorrect Answer
    D (a)0.82.0 ├Ч 10^-3 T (b) 0.5 Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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