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Things that would stop electrons flowing in a circuit would be insulators, breaks in the circuit such as open switches, or items that have the same effect. Electrons also generally will not flow if the source of the electrical potential is inhibited or removed... i.e., they don't feel any electromotive force such as the Coulomb force (or Lorenz force, depending on the situation); although superconductors seem an interesting exception the flow can still be attributed to a previous source of electrical potential and lack of resistance. Free electrons in a vacuum may still "flow" for similar reasons, until acted upon by a force such as encountering matter.

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Related Questions

Does an insulator allow the flow of electrons?

Yes . Some insulators do allow the flow of electrons but most do not.


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