A toroid has a core (nonferromagnetic) of inner radius \( 25 \mathr...

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A toroid has a core (nonferromagnetic) of inner radius \( 25 \mathrm{~cm} \) and outer radius \( 26 \mathrm{~cm} \) around which 3500 turns of a wire are wound. If the current in the wire is \( 11 \mathrm{~A} \), what is the magnetic field outside the toroid?
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