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Question

Magnetic field outside a toroid is in non-ideal circumstances.

A
zero
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B
non zero
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C
not defined
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Solution

The correct option is B non zero
I know I have not told you about non-ideal circumstances. In an ideal toroid the coils are circular. But in reality the turns of the toroidal coil form a helix and there is always a small magnetic field external to the toroid

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