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Q.

A solenoid has 103 turns per unit length. On passing a current of 2A, magnetic induction is measured to be 4πWb/m2 . Calculate magnetic susceptibility of core

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a

49999

b

4999

c

49

d

499

answer is D.

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Detailed Solution

NL=103,i=2A,B=4πwb/m2B=μ0H(χ+1); B=μ0NLi(1+χ)4π=4π×107×103×2(1+χ)5000=1+χχ=4999

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