Revision Notes

4.2.4 Charging by Induction

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Charging by Induction Explained

  • When a charged object is held close to a conductor, electrons in the conductor are able to move towards (or away from) the charged object:

Charging-by-induction, IGCSE & GCSE Physics revision notes

Negative electrons in the aluminium are attracted to the positive rod 

  • In the diagram above, electrons in the aluminium foil are attracted to the positively charged rod
  • This causes the top of the foil to become negatively charged, whilst the bottom edge of it will be left with a positive charge
  • The attraction between the positive rod and the negative charges on the top surface of the foil will cause the foil to be attracted to the rod


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