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Question

Magnetic field due to a current carrying toroidal at the inside of toroid is independent on

A
number of turns of toroid
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B
current passes through it
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C
mean radius of toroid
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D
All of the above
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Solution

The correct option is D All of the above

Magnetic field produced by toroid inside the core of toroid is given by

B=μ0Ni2πr

But inside the toroid, i=0

B=0

So, B does not depend upon any parameter for inside region of toriod.

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