home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
ARM Club 1
/
ARM_CLUB_CD.iso
/
contents
/
sillies
/
silly8
/
W
/
WhatIsElec
< prev
next >
Wrap
Text File
|
1994-02-18
|
5KB
|
100 lines
WHAT IS ELECTRICITY ?
---------------------
(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
*** EOF