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PhysicsJEE Main 4 Apr 2026, Shift 2·Q14·MCQ·Easy–moderate

Magnetism and Matter · Magnetic materials

A solenoid has a core made of material with relative permeability 400. The magnetic field produced in the interior of solenoid is 1.0 T. The magnetic intensity in SI units is α×105\alpha\times10^{5}. The value of α\alpha is . (Free space permeability μ0=4π×10−7\mu_0 = 4\pi\times10^{-7} SI units).
  1. (1)25π\dfrac{25}{\pi}
  2. (2)116π\dfrac{1}{16\pi}
  3. (3)1π\dfrac{1}{\pi}
  4. (4)14π\dfrac{1}{4\pi}
We corrected a printing error in the original paper

Source printed “The magnetic intensity is SI units”.

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