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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ss220

Which of the following statements about magnetic ordering are correct?

  1. AAn antiferromagnetic solid has a larger net moment than a ferromagnetic solid of the same composition.
  2. BIn a ferrimagnetic solid the antiparallel moments are unequal, leaving a net moment.
  3. CAn antiferromagnetic solid has zero net magnetic moment.
  4. DIn a ferromagnetic solid the moments within a single domain are aligned parallel to each other.

Answer: B, C, D

Within a ferromagnetic domain the moments are aligned parallel (true); ferrimagnets have antiparallel but unequal moments, leaving a net moment (true); antiferromagnets have equal opposite moments, so the net is zero (true). Zero cannot exceed a ferromagnet's net moment, so the last statement is false.
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