Verified Solution • 2025–26 Session moderate

QNEET-2020-Ph-716: NEET 2020 Physics - Class 12 NEET-2020-Ph-716 Solution: An iron rod of susceptibility 599 is subjected to a magnetizing …

An iron rod of susceptibility 599 is subjected to a magnetizing field of 1200 A m−11200\ \text{A m}^{-1}. The permeability of the material of the rod is: (μ0=4π×10−7 TmA−1\mu_0 = 4\pi \times 10^{-7}\ \text{TmA}^{-1}) 8.0×10−5 TmA−18.0 \times 10^{-5}\ \text{TmA}^{-1} 2.4π×10−5 TmA−12.4\pi \times 10^{-5}\ \text{TmA}^{-1} 2.4π×10−7 TmA−12.4\pi \times 10^{-7}\ \text{TmA}^{-1} 2.4π×10−4 TmA−12.4\pi \times 10^{-4}\ \text{TmA}^{-1}

Multiple Choice Options

  • A 8.0×10−5TmA−18.0 \times {10^{ - 5}}Tm{A^{ - 1}} 8.0 _ 1 0 _ 5 T m A _ 1
  • B 2.4π×10−5TmA−12.4\pi \times {10^{ - 5}}Tm{A^{ - 1}} 2.4 � _ 1 0 _ 5 T m A _ 1
  • C 2.4π×10−7TmA−12.4\pi \times {10^{ - 7}}Tm{A^{ - 1}} 2.4 � _ 1 0 _ 7 T m A _ 1
  • D 2.4π×10−4TmA−12.4\pi \times {10^{ - 4}}Tm{A^{ - 1}} 2.4 � _ 1 0 _ 4 T m A _ 1

Step-by-Step Verified Solution

X m = 599 _ r = 1 + X m = 600 _ = _ r _ 0 = 600 _ 4 � _ 10 _ 7 = 2.4 � _ 10 _ 4 T m A _ 1

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