Question

21) Explain why magnetic field outside a torroid is zero?​

Answer 1

Answer:

It is non zero only inside the core of a toroid. By definition, Ampere's Law states that integration of magnetic field over an amperian loop is equivalent to constant μ multiplied by current enclosed. Therefore, current enclosed by Amperian loop is zero. Thus, magnetic field outside the toroid is zero

Answer 2

Answer:

After applying Ampere's Law, we see that the magnetic field at any point outside the toroid is zero because the net electric current is zero.

Explanation:

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