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JEE Main 202120 JulyEvening Shift
Exam
JEE Main
Year
2021
Date
20 July
Shift
Evening Shift
Subject
Physics
Chapter
Magnetic Properties of Matter

JEE Main 2021 · 20 July · Evening Shift · Physics · Magnetic Properties of Matter

The magnetic susceptibility of a material of a rod is 499 ....

The magnetic susceptibility of a material of a rod is 499.499 . Permeability in vacuum is 4π×10−7Hm−1.4\pi \times {10}^{- 7}{Hm}^{- 1} . Absolute permeability of the material of the rod is

Options

  1. A4π×10−4Hm−14\pi \times {10}^{- 4}{Hm}^{- 1}
  2. B2π×10−4Hm−12\pi \times {10}^{- 4}{Hm}^{- 1}
  3. C3π×10−4Hm−13\pi \times {10}^{- 4}{Hm}^{- 1}
  4. Dπ×10−4Hm−1\pi \times {10}^{- 4}{Hm}^{- 1}

Correct answer

B. 2π×10−4Hm−12\pi \times {10}^{- 4}{Hm}^{- 1}

Step-by-step solution

μ=μ0(1+xm)\mu = {\mu}_{0}\left(1 + {x}_{m}\right)

=4π×10−7×500= 4\pi \times {10}^{- 7} \times 500

=2π×10−4Hm−1= 2\pi \times {10}^{- 4}{Hm}^{- 1}

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