Practice question · Sort into groups
Sort each statement by whether it applies to a dielectric or a magnetic material.
Groups: Dielectrics only · Magnetic materials only · Both
- Retains state after field
- Relative constant is > 1
- Relative constant is < 1
- Unit volume susceptibility
- Auxiliary field hides bounds
Hints
- The two theories are close parallels, with one important asymmetry.
- Diamagnets reduce the field, which has no dielectric counterpart.
Show the answer
Dielectrics only: Relative constant is > 1
Magnetic materials only: Relative constant is < 1, Retains state after field
Both: Auxiliary field hides bounds, Unit volume susceptibility
Why
The parallel is close, both define an auxiliary field and a susceptibility. It breaks in two places: magnetic susceptibility can be negative, and ferromagnets remember their history in a way no dielectric does.
Practise Magnetic Materials
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