Physics | VITEEE 2016 | Discussion Page

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Two solenoids are given- 1st has 1 turn per unit length and 2nd has n turns per unit length.Ratio of magnetic fields at their centres is

A) n:1

B) 1:n

$1:n^{2}$

$n^{2}:1$

Option B

Magnetic field $\propto$ no. of turns per unit length

$\therefore$ Required ratio =1:n

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