First slide
Inductance
Question

A solenoid having 500 turns and length 2 m has radius of 2 cm, then self inductance of solenoid is :

Moderate
Solution

Self inductance of solenoid is :

L=μ0n2Sl                                          S=πr2 L=4π x 10-7 x N2l2πr2 x l              n=Nl   =4π2 x 10-7 x 252 x 104 x 4 x 10-4 L=2 x 10-4 H

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