Q)
(chatquestion)...A very long solenoid is made out of a wire
with n turns per unit length. The radius of the
cylinder is a and is negligible compared to its
length 1. The interior of the cylinder is filled
with materials such that the linear magnetic
permeability varies with the distance r from
axis according to
= constant ; for 0 <r <b
µ(r) =
[l2 = constant ;
for b <r <a]
The self inductance of the solenoid is
(A) zn²l[µb² + µra²]
(B) Tn²1[µ1+ µz]a²
(C) tn²l[µb² + µ2(a² – b?)]
(D) în²l[µb² + (µi+ µ2) a²]...(Please answer this question
1 Answer
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