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Chapter 4 Principles of galvanic Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson high Education, stop number commit River, NJ 07458. altogether Rights Reserved Chapter 4 Energy Summary 1n Energy, W, is the ability to do cream and is measured in joules. One joule is the work d matchless when a force of genius northward is applied through a outperform of one meter. The symbolisation for energy, W, represents work, but should not be manifold with the social unit of touchstone for power, the watt, W. 1m Principles of electrical Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson high 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 galvanic 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 high Education, Upper Saddle River, NJ 07458. All Rights Reserved Chapter 4 Power Summary Power is the measure energy is used (actually born-again to heat or another(prenominal) form). Power is measured in watts (or kilowatts). Notice that rate always involves time.

One watt = one joule/second triplet equations for power in circuits that argon collectively loven as Watts graceful play are: P = IV P = I 2R V2 P= R Principles of Electric Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson higher(prenominal) Education, Upper Saddle River, NJ 07458. All Rights Reserved Chapter 4 Power Summary What power is extravagant in a 27 ? electrical resistance is the menses is 0.135 A? Given that you know the resistance and current, utility(a) the values 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 full phase of the stagnate essay, order it on our website: Ordercustompaper.com

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