Verified Solution • 2025–26 Session moderate

QJEEM23Ph2267: JEE Main 2023 Physics - Class 12 JEEM23Ph2267 Solution: A solenoid of 1200 turns is wound uniformly in a single layer…

A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube 2 m long and 0.2 m in diameter. The magnetic intensity at the center of the solenoid when a current of 2 A flows through it is :

Multiple Choice Options

  • A 1 A m−1\mathrm{1~A~m^{-1}}
  • B 2.4×10−3 A m−1\mathrm{2.4\times10^{-3}~A~m^{-1}}
  • C 1.2×103 A m−1\mathrm{1.2\times10^{3}~A~m^{-1}}
  • D 2.4×103 A m−1\mathrm{2.4\times10^{3}~A~m^{-1}}

Step-by-Step Verified Solution

Number of turns per unit length =12002=600=\frac{1200}{2}=600

So, Magnetic Intensity H=nIH=n I

amp;=600×2 Am−1amp;=1200 Am−1\begin{aligned}& =600 \times 2 ~\mathrm{Am}^{-1} \\\\& =1200 ~\mathrm{Am}^{-1}\end{aligned}

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