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True or false: a diamagnetic material is attracted into a magnetic field.

  • A.False, a diamagnetic material being repelled towards the weaker field
  • B.True, all materials being attracted to some degree
  • C.True, but only if the field is very strong
  • D.True, the induced moments aligning with the field

Answer: A

The induced moments oppose the applied field, so the material is repelled from the region of strongest field. The effect is tiny but real, and it is what allows a frog or a drop of water to be levitated in a sufficiently strong field gradient.

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