Electricity
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kirchoffs_laws
The American Experience | Edison's Miracle of Light | AC -
AC/DC: What's the Difference? In 1887 direct current (DC) was king. At that time there were 121 Edison power stations scattered across the United States delivering DC electricity to its customers.
Electricity timeline - text
600BC: Static electricity Thales, a Greek, found that when amber was rubbed with silk it attracted feathers and other light objects.