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PhysicsMagnetismBiot-savart's & Ampere's Circuital lawHard2 minPYQ_2023

PhysicsHardsingle choice

Inductance per unit length near the middle of a long solenoid is $(μ_{0} =$ permeability of free space, $n =$ number of turns per unit length, $d =$ the diameter of the solenoid)

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Solution:

The inductance long solenoid is $L = \frac{μ _{0} N ^{2} A}{l} L = μ_{0} (\frac{N}{l})^{2} \times π \times \frac{d ^{2}}{4}$ $∴$ The inductance per unit length near the middle of a long solenoid is: $\frac{L}{l} = μ_{0} π (\frac{nd}{2})^{2} \dots . (∵ \frac{N}{l} = n)$

Stream:MHT_CETSubject:PhysicsTopic:MagnetismSubtopic:Biot-savart's & Ampere's Circuital law

⏱ 2mℹ️ Source: PYQ_2023

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