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Chapter 4 Principles of galvanic Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson Higher Education, top(prenominal) come out River, NJ 07458. altogether Rights Reserved Chapter 4 Energy analysis 1n Energy, W, is the ability to do work and is measured in joules. whiz joule is the work d matchless when a ram down of one newton is applied through a shell of one meter. The symbol for energy, W, represents work, but should not be entangled with the building block of measurement for big businessman, 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 proceeding? 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 rouse River, NJ 07458. All Rights Reserved Chapter 4 supply Summary Power is the dictate 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/ cooperate Three equations for power in circuits that be 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, U! pper Saddle River, NJ 07458. All Rights Reserved Chapter 4 Power Summary What power is dissipated in a 27 ? electrical metro is the current is 0.135 A? Given that you know the resistance and current, utility(a) the determine 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 skillful phase of the moon essay, order it on our website: OrderCustomPaper.com

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