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kilowatt-hour meter - A meter used by electric utility companies to measure the amount of electric power used by a customer.
kilowatt-hour - 1000 watts for 1 hour.
watt - Unit of electrical power required to do work at the rate of one joule per second. One watt of power is expended when one ampere of direct current flows through a resistance of one ohm. In an AC circuit, true power is the product of effective volts and effective amperes, multiplied by the power factor.
wattage rating - Maximum power a device can safely handle continously.
watt-hour - Unit of electrical work, equal to a power of one watt being absorbed for one hour.

Transformers
Transformers Transformers are one of the major uses of coils. They are made of two or more separate coils of wire wrapped around a common core, normally made of laminated iron sheets. Like so...
electronics-for-beginners.com/pages/page/2090/


How to Desolder
How to De-solder You'll need two things: Soldering iron - 15-30 Watt for sensitive jobs, You don't want them too hot or they may damage the components. Device to Remove Solder - Either a
electronics-for-beginners.com/pages/page/8/

Direct current
Direct Current (DC) Current can flow forwards or backwards through a conductor. When it only flows in one direction it is know as direct current (DC). When if flows in both directions it is know as A
electronics-for-beginners.com/pages/page/1040/