MHT CET 2022 Physics question
A toroid has a core of inner radius 'r' and outer radius 'r', around which 'N' turns of wire are wound. If the current in the wire is 'I' then the magnetic field inside the toroid is ( = permeability of free space)
Answer: (B)
Solution
Applying Ampere's law along the mean circular path of radius inside the toroid: , so . Substituting gives \frac${μ_0
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