A bicycle with gears attached to an electric generator powers 3 headlights that can be turned on successively. It is noticeably more difficult to pedal after each light is turned on. A voltmeter and ammeter are attached to the bicycle handlebars and measure the generated power as the student pedals.

Note: A dolly from the stock room is required to move this heavy platform with a bicycle and a generator. The demonstration is located in the Thimann Labs building (in one of the undergraduate labs). Please give at least 3-days’ notice when requesting it.