Discussion
True or false: bound charge in a dielectric can be conducted away by earthing the material.
Answer: C
Correct answer: False, bound charge being unable to move through the dielectric to earth
Bound charge is not free to move: it belongs to molecules held in place, and an earth connection has nothing to conduct. That is exactly what distinguishes it from the free charge on a conductor, which an earth wire removes at once. The bound charge disappears only when the field that produced the polarisation is removed.
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