MHT CET 2026 Physics question
Two concentric circular coils having radii r and r (r r) are placed co-axially with centres coinciding. The mutual inductance of the arrangement is (Both coils have single turn, = permeability of free space)
Answer: (D)
Solution
Pass a current through the large coil (radius ). The field at the centre is . Since , this field is nearly uniform over the small coil, so the flux through it is r_2^2\dfrac${μ_0
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