# History of Electricity

## History of Electricity

• Submitted By: redbubble
• Date Submitted: 04/09/2011 3:06 AM
• Category: Science
• Words: 1225
• Page: 5
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Physics Reviewer
History of Electricity
* 600 B.C.
* Thales – was the one who noticed that Amber charged by rubbing it with a cat’s fur.
* 1600 A.D.
* William Gilbert – coined the term ‘electricity’ from the Greek form “Amber”
* 1752
* Benjamin Franklin – made a lightning rod from an accident
* He flew a kite during the thunderstorm
* 1786
* Guigi Galvani – discovered that organisms (humans) have serve impulses
* Through an experiment where the muscle of a frog twitched when he jolted it with electricity
* 1800
* Alessandro Volta – Electric Battery
* 1820
* Hans Chrisitan Oerested – related electricity to magnetism
* Marie Ampere – showed that magnetic field is produced through coil of wires
* 1821
* Michael Faraday – he invented electric motor/dynamo
* 1826
* George Simon Ohm – identified current resistance and the electric potential in a circuit
* 1879
* Thomas Edison – incandescent lamp
* 1880
* Nikola Tesla - rotating field Alternating Current (AC) alternator
* James Watt – his steam engine was used to power Edison’s direct current generator

Electric Charges
* Electric Force – a long distance force due to the interaction of electric charges
* Electric Charge

Proton | Electron |
* Positive charge | * Negative charge |
Mp = 1.67 x 10-27kg | Me = 9.11 x 10-31kg |
e = 1.6 x 10-19C | -e = 1.6 x 10-19C |

* Conductors – allow electricity to pass through/electrons to flow
* Insulators – does not allow electricity to pass through
*
* q = ne
How do IONS Form?
*
* By losing or gaining
* Anion – negatively charged
* Cation – positively charged

* q = Net Charge
* n = Number of Charges
* e = kind of charge
*
* Problems
1.) In walking across a carpet, you acquire a net negative charge of 50C. How many excess electrons do you have?

G: q = -50 C
e = 1.6 x 10-19 C
U: n = ?
F: q=ne...