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A material of relative permeability 500 has a magnetic susceptibility of

  • A.501
  • B.0.002
  • C.499
  • D.500

Answer: C

Since \( \mu_r = 1 + \chi_m \), the susceptibility is one less than the relative permeability. For a ferromagnetic material the difference of one is negligible, but for a diamagnetic or paramagnetic material the susceptibility is the only quantity worth quoting.

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