Electricity & Magnetism

Finger Tingler

Electricity is generally invisible, inaudible, tasteless, and odorless. We normally have no way of sensing its presence except with some kind of instrument. This exhibit allows the visitor to experience the flow of electricity directly as well as through the visual indication of a meter. We hope that this experience tends to make one more appreciative of indications one encounters on meters in this exhibit and elsewhere, (in the exhibit builder's words, “Hey I know how that current meter feels. Man, I been there!”) With this exhibit the visitor turns a hand-cranked generator and receives a mild electric shock. Since the person cranks the generator the shock received is only as large as the visitor wishes. Two meters indicate voltage and current. Visitors can plainly see that voltage can be present without current and that small amounts of electricity won't kill them.