Can we generate electricity by using rotation of wheel of a bicycle ?
With a Dynamo that convert part of he mechanical force - the mouvement - into electricity. The Dynamo uses a rotating magnet that create electric current into coils or vice versa. A moving coil around a fixed magnet induce a current into the coil that opposes the mouvement and breaks. Dynamo uses the law of induction of Faraday. https://en.m.wikipedia.org/wiki/Dynamo https://en.m.wikipedia.org/wiki/Faraday%27s_law_of_induction You can buy a Dynamo anywhere in bike shops or in online stores.