Practice question · Select all that apply
Which statements about bound charge are correct?
Hints
- Three are the standard results; one would make polarisation physically pointless.
- If bound charge produced no field, a dielectric could not weaken anything.
Show the answer
- B. Bound charges are real charges that cannot move freely through the material
- C. Volume bound charge is minus the divergence of the polarisation
- D. Surface bound charge equals the polarisation component along the outward normal
Why
Bound charges are genuinely there and genuinely produce field, that is exactly how a dielectric reduces the internal field. They differ from free charge only in being unable to migrate through the material.
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