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charge conservation

5A10.10 – Charge conservation [two buckets]

Wool and the short, yellow PVC pipe are a good combination: put the wool in one pot and stir/rub the PVC pipe against the wool. Then remove the PVC pipe from the pot and transfer it to the other pot.

One of the electroscopes in the photographs suffers from static friction. Gently tap it to release the needle and you will see the needle deflecting.