Q 12-05-038JEE MainJEE Main 2023 (25 Jan, Shift 1)Easy
A solenoid of $1200$ turns is wound uniformly in a single layer on a glass tube $2\ \text{m}$ long and $0.2\ \text{m}$ in diameter. The magnetic intensity at the center of the solenoid when a current of $2\ \text{A}$ flows through it is
Answer: (B) $1.2\times10^3\ \text{A m}^{-1}$
$H=nI=\dfrac{1200}{2}\times2=1.2\times10^3\ \text{A m}^{-1}$.
Solution by Sreeraj P, M.Sc Physics