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- WHAT IS ELECTRICITY ?
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-
- (This amusing bit of text was found in the files area of an American BBS)
-
-
- Today's most pressing scientific questions are: "What is electricity?" and
- "Where does it go after it leaves the power supply?"
-
- Here is a simple experiment that will teach you an important lesson about
- electricity:
-
- On a cool, dry day, scuff your feet along a carpet, then reach into your
- friend's mouth and touch one of his dental fillings. Notice how he twitches
- violently and cries out in pain?
-
- This teaches us that electricity can be a very powerful force and we must
- never misuse it or use it to hurt others (unless we need to learn something
- that he won't tell).
-
- When you scuffed your feet on the carpet, you picked up batches of"electrons"
- which are incredibly tiny objects that the carpet manufacturersweave into the
- carpets so they will attract dirt.
-
- The electrons travel through your bloodstream and collect in your fingers.
- There they form a spark that jumps to your friend's filling, then they
- travel to his feet and back into the carpet, thereby completing the circuit.
-
- AMAZING ELECTRONIC FACT: If you scuffed your feet long enough without touching
- anything, you would build up so many electrons that your finger would explode!
- (This is nothing to worry about if you don't have carpeting.) It is said that
- putting a thimble on each fingertip will prevent this.
-
- Although we modern people tend to take our electric lights, radios, mixers,
- and so on for granted, hundreds of years ago people did not have any of these
- things (which is just as well because there was no place to plug them in
- anyway).
-
-
- Then along came the first Electrical Pioneer, Benjamin Franklin, who flew a
- kite in a lightning storm and received a serious electric shock. This proved
- that clouds were powered by the same force as carpets, but it also damaged his
- brain to the extent that he spent a great deal of time speaking in
- incomprehensible maxims such as "A penny saved is a penny earned."
- Eventually, to protect the general public, he was given a job in the Post
- office. He died of syphillis, which only proves that one should never fool
- around with Mother Nature!
-
- After Franklin came a herd of Electrical Pioneers whose names have become a
- part of our electrical terminology: Myron Volt, Mary Lou Amp, James Watt, Bob
- Transformer, Billy Joe Farad, and Ozro Henry. These pioneers conducted many
- important electrical experiments--among them, Galvani discovered (honestly)
- that when he attached two different kinds of metal to the legs of a frog, an
- electrical current developed and the frog's leg kicked, even though it was
- dead as a hammer.
-
- Galvani's discovery led to enormous advances in the field of amphibian
- medicane. Today, skilled veterinary surgeons can take a frog that has been
- seriously injured or killed by a car, implant pieces of metal in its muscles,
- and watch it jump back into the pond like a normal frog (except that now it
- will sink like a stone!).
-
- The greatest Electrical Pioneer of them all was Thomas Alva Edison, who was
- a brilliant inventor (despite the fact that he had little education, and lived
- in New Jersey!).
-
- Edison's first major invention was the phonograph (in 1877), which soon could
- be found in thousands of American homes, where it basically sat until 1923 when
- the record was invented. But Edison's greatest achievement came in 1879 when
- he invented the electric company. Edison's design was a brilliant adaptation of
- the simple electrical circuit: the electric company sends electricity through
- a wire to acustomer, then immediately gets the electricity back through another
- wire, then (this is the brilliant part) sends it right back to the customer
- again (3600 times a minute).
-
- This means that an electric company can sell a customer the same batch of
- electricity over five million times a day. In fact, the last time any NEW
- electric current was generated in this country was in 1937.
-
- Incidentally, Edison is widely credited with the "smoke theory" of
- electronics which maintains that all components in any given circuit really
- operate on a minute charge of white smoke and when the component fatigues and
- releases its smoke, it is rendered useless since its source of energy has
- escaped.
-
- Today, thanks to men like Edison and Franklin (and frogs like Galvani's
- Kermit) we receive almost unlimited benefits from electricity.
-
- For example, in the past decade scientists have developed the LASER, an
- electronic appliance so powerful that it can vaporize a bulldozer at 2,000
- yards, yet so precise that a doctor can use it to perform delicate operations
- on the human eyeball (provided, of course, that they remember to change the
- setting from "VAPORIZE BULLDOZER" to "DELICATE").
-
-
- ANON Bob, G4BDE @ GB7ULV
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- *** EOF
-