Measurement of Electricity

Measurement of Electricity Coronet Instructional Films Teenage boy, Don, in kitchen trying to find somewhere to plug in lamp for workbench - doesn’t want to blow fuse - examines plugged-in heater - 750w 120v - checks 15amp fuse on lamp. Don looks in science textbook - falls asleep wondering what Volts, Watts & Amperes are - scientists in book start talking to him. “I’m Alessandro Volta” - tells Don how he discovered volts - electrical pressure. Pushing lawn mower. Homemade voltometer. 14:35:52 “I am Ampere, I am over on the next page. I discovered how electrical current flows” - gives example of moving pennies across table & flow of service station gasoline pump. 14:37:10 “I am George Ohm - I discovered that various materials have different electrical resistances” - Don wires bulb to dry cell - Ohm’s Law: amps = volts over ohms. Don makes calculations on notepad. 14:40:07 “My name is James Watt...it is a unit of electrical power” - example of locomotive horsepower - Don checks mother’s iron w/ power of 1000w at 120v & works out amps. Don in silhouette sees himself sleeping at table - wakes up. Science - Physics. Scientific Experiments. Educational Films