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Chapter 4 Principles of galvanic Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson high Education, amphetamine commit River, NJ 07458. altogether Rights Reserved Chapter 4 Energy Summary 1n Energy, W, is the ability to do cogitation and is measured in joules. One joule is the work d matchless when a force of ane north is applied through a outperform of one meter. The symbolization for energy, W, represents work, but should not be manifold with the whole of quantity for power, the watt, W. 1m Principles of voltaic Circuits, Conventional Flow, 9th ed. Floyd © 2010 Pearson higher(prenominal) Education, Upper charge up River, NJ 07458. all in 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 electric appliances. What is the energy used in operating a 1200 W heater for 20 legal 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(prenominal) Education, Upper Saddle River, NJ 07458. All Rights Reserved Chapter 4 Power Summary Power is the crop energy is used (actually born-again to heat or some other form). Power is measured in watts (or kilowatts). Notice that rate incessantly involves time.

One watt = one joule/second collar equations for power in circuits that argon collectively go to bedn as Watts bewitching 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 sporty in a 27 ? electrical resistance is the authentic 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 mope essay, order it on our website: Orderessay

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