Electric power source | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-29

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electric_power


00:01:07 1 Definition
00:01:43 2 Explanation
00:02:22 2.1 Passive sign convention
00:04:41 2.2 Resistive circuits
00:05:24 2.3 Alternating current
00:06:18 2.4 Electromagnetic fields
00:10:15 3 Generation
00:11:23 4 Electric power industry
00:13:48 5 Use
00:14:31 6 See also
00:15:46 7 Notes



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SUMMARY
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Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
Electric power is usually produced by electric generators, but can also be supplied by  sources such as electric batteries.   It is usually supplied to businesses and homes (as domestic mains electricity) by the electric power industry through an electric power grid. Electric energy is usually sold by the kilowatt hour (1 kW·h = 3.6 MJ) which is the product of the  power in kilowatts multiplied by running time in hours.  Electric utilities measure power using an electricity meter, which keeps a running total of the electric energy delivered to a customer.
Electrical power provides a low entropy form of energy and can be carried long distances and converted into other forms of energy such as motion, light or heat with high energy efficiency.