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Magnetism and Matter question

2024 · Q154
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Magnetism and Matter question

2024 · Q154

NEETPhysicsMagnetism and MatterMCQ+4 / −1

The incorrect relation for a diamagnetic material (all the symbols carry their usual meaning and ε\varepsilonε is a small positive number) is

  1. A
    μ<μ0\mu<\mu_0μ<μ0​
  2. B
    0≤μr<10 \leq \mu_r<10≤μr​<1
  3. C
    −1≤χ<0-1 \leq \chi<0−1≤χ<0
  4. D
    1<μr<1+ε1<\mu_r<1+\varepsilon1<μr​<1+ε
View written solutionFree

Correct answer: D

For diamagnetic material,

$$\begin{aligned} & 0 \leq \mu_r<1 \\ & \chi=\mu_r-1 \\ & \Rightarrow-1 \leq \chi<0 \\ & \mu_r=\frac{\mu}{\mu_0} \\ & \Rightarrow \mu<\mu_0 \quad\left(\because \mu_r<1\right) \end{aligned}$$

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