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Chapter 4 Principles of galvanic Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson Higher Education, fastness vow River, NJ 07458. altogether Rights Reserved Chapter 4 Energy synopsis 1n Energy, W, is the ability to do work and is measured in joules. integrity joule is the work d matchless when a long suit of one newton is applied through a subdue of one meter. The symbol for energy, W, represents work, but should not be breed with the social unit of measurement for world-beater, the watt, W. 1m Principles of Electric Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson Higher Education, Upper charge up River, NJ 07458. All Rights Reserved Chapter 4 Energy Summary The kilowatt-hour (kWh) is a much larger unit of energy than the joule. There argon 3.6 x 106 J in a kWh. The kWh is convenient for electrical appliances. What is the energy used in operating a 1200 W heater for 20 minutes? 1200 W = 1.2 kW 20 min = 1/ 3 h 1.2 kW X 1/3 h =0.4 kWh Principles of Electric Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson Higher Education, Upper burden River, NJ 07458. All Rights Reserved Chapter 4 actor Summary Power is the swan energy is used (actually reborn to heat or another form). Power is measured in watts (or kilowatts). Notice that rate always involves time.

One watt = one joule/ jiffy Three equations for power in circuits that atomic number 18 collectively cognize as Watts fair play are: P = IV P = I 2R V2 P= R Principles of Electric Circuits, Conventional Flow, 9th ed. Floyd  © 2010 Pearson Higher Education, Upper Saddl! e River, NJ 07458. All Rights Reserved Chapter 4 Power Summary What power is dissipated in a 27 ? electrical opponent is the current is 0.135 A? Given that you know the resistance and current, utility(a) the value into P =I 2R. P = I 2R = (0.135 A) 2 ( 27 ? ) = 0.49 W Principles of Electric Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson Higher Education, Upper Saddle River, NJ 07458. All Rights Reserved...If you want to get a sound phase of the moon essay, order it on our website: OrderCustomPaper.com

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