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MHT CET Physics question

PhysicsElectromagnetic InductionMHT CET

The length of solenoid is whose windings are made of material of density D and resistivity . The winding resistance is R. The inductance of solenoid is ( m = mass of winding wire, = permeability of free space) [MHTCET 2020]

Answer: (A)

Solution

Let x be the wire length with cross-section a: and , so ; with , \dfracMissing superscript or subscript argument{μ_0N^2$π

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Question ID VK-082238