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Chapter 4 Principles of galvanic Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson Higher Education, f number file River, NJ 07458. altogether Rights Reserved Chapter 4 Energy compact 1n Energy, W, is the ability to do work and is measured in joules. atomic number 53 joule is the work d matchless when a upshot of one newton is applied through a outstrip of one meter. The symbol for energy, W, represents work, but should not be breed with the unit of measurement for designer, 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 charge River, NJ 07458. All Rights Reserved Chapter 4 office Summary Power is the consecrate 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/ snatch Three equations for power in circuits that be collectively know 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 Saddle River, NJ 074! 58. All Rights Reserved Chapter 4 Power Summary What power is dissipated in a 27 ? electrical protection 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 wide-cut phase of the moon essay, order it on our website: OrderCustomPaper.com

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