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AIIMS 2010
Exam
AIIMS
Year
2010
Subject
Physics
Chapter
Magnetic Properties of Matter

AIIMS 2010 · Physics · Magnetic Properties of Matter

Which of the following is true regarding dimagnetic substances...

Which of the following is true regarding dimagnetic substances (symbols have their usual meaning)

Options

  1. Aμr>1,χm>1\mu_r>1, \chi_m>1
  2. Bμr>1,χm<1\mu_r>1, \chi_m < 1
  3. Cμr<1,χm<0\mu_r < 1, \chi_m < 0
  4. Dμr<1,χm>0\mu_r < 1, \chi_m>0

Correct answer

C. μr<1,χm<0\mu_r < 1, \chi_m < 0

Step-by-step solution

Relative magnetic permeability of diamagnetic substances is always less than unity. i.e. μr<1\mu_r < 1 μr=\mu_r=\left(1+\chi_m\right)asas\mu_r < 1, \chi_m is negative. Hence, susceptibility of diamagnetic substances has a small negative value.
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