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NEET 2020
Exam
NEET
Year
2020
Subject
Physics
Chapter
Magnetic Properties of Matter

NEET 2020 · Physics · Magnetic Properties of Matter

An iron rod of susceptibility 599 is subjected to a magnetising...

An iron rod of susceptibility 599599 is subjected to a magnetising field of 1200Am–11200A{m}^{– 1}. The permeability of the material of the rod is:
(μ0=4π×10−7TmA−1)\left({\mu}_{0} = 4\pi \times {10}^{- 7}Tm{A}^{- 1}\right)

Options

  1. A8.0×10−5TmA−18.0 \times {10}^{- 5}Tm{A}^{- 1}
  2. B2.4π×10−5TmA−12.4\pi \times {10}^{- 5}Tm{A}^{- 1}
  3. C2.4π×10−7TmA−12.4\pi \times {10}^{- 7}Tm{A}^{- 1}
  4. D2.4π×10−4TmA−12.4\pi \times {10}^{- 4}Tm{A}^{- 1}

Correct answer

D. 2.4π×10−4TmA−12.4\pi \times {10}^{- 4}Tm{A}^{- 1}

Step-by-step solution

μr=xm+1=599+1=600{\mu}_{r} = {x}_{m} + 1 = 599 + 1 = 600

μ=μoμr=4π×10−7×600\mu = {\mu}_{o}{\mu}_{r} = 4\pi \times {10}^{- 7} \times 600

=2.4π×10−4TmA= 2 . 4\pi \times {10}^{- 4}\dfrac{Tm}{A}

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