NEET Physics Electromagnetic Induction Questions Solved


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If all linear dimensions of an inductor are tripled, then self inductance will become (keeping total number of turns per unit length constant)

1.  3 times

2.  9 times

3.  27 times

4. 13 times

L=un2LA = un2 L×πR2  Final length = 3L  Final radius of X-section = 3R  Final self inductance,      L'=un2×3L×π3R2          =27 un2LA      L'=27L

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