MHT CET 2026 Physics question
A rod with a circular cross-section area and length 40 cm is wound uniformly with 400 turns of an insulated wire. If a current 0.4 A flows in the wire winding, the total magnetic flux produced inside the winding is Wb. The relative permeability of the rod is (Given permeability of vacuum N m A)
Answer: (C)
Solution
Turns per unit length . Field inside the winding with the rod: T. Flux with 10^{-4}$\
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