
How heavy is electricity?
Electricity is just a flow of electrons, and these electrons do have mass, but it is an absurdly small amount.
Asked by: Anonymous
Electricity is, strictly speaking, just the flow of electrons and so it doesn’t make sense to talk of it weighing anything as it’s an abstract quantity. That said, the electrons themselves certainly have mass, albeit very little: each one is around 2000 times lighter than a proton, which itself weighs just a billion-billion-billionth of a kilogram.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Authors

Robert is a science writer and visiting professor of science at Aston University.
Subscription offer
Subscribe and save 50% on the shop price. Pay just £16.50 every 6 issues by Direct Debit. Receive every issue delivered direct to your door with FREE UK delivery.