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Unformatted text preview: Name Jooho BClLActe 9/19/08 Closed book, closed notes, no calculators. Work each problem in the area provided. You may use the back of the test sheets for scratch area, but they will not be graded. Show your work neatly. Point values for each problem are given. Put your name on each page. Problem 1 (15 pts). Four identical light-bulbs are connected to a voltage source, as shown. If bulb one is observed to emit P l = 1 watt of power in the form of light, how much power is emitted by bulbs 2,3 and 4? That is, what are P 2 ' P 3 and P 4 ? \j-:.L R ~ 'i'= a'- ~~ P3\\ p,\ ?:::: vc... ~ P, I P, ;;lW V I-= \ ) 1 - l. - ;;: V'S T ' P t =(\1, (Y.;:') '7 '!1:. 'V \ l.. L~= ~ L- \= \ P L \,,\ov-> • f ' J ~.'C\es \.I •.• \Is ~, P l . : l - = / 1 J :: Problem 2 (15 pts). A battery is connected to a load of resistance R at time = O. The voltage is observed to begin at a value vaand then to decrease linearly asthe battery dischargesuntil a time T, after which the battery is fully depleted and supplies no more power to the load from that time on.after which the battery is fully depleted and supplies no more power to the load from that time on....
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This note was uploaded on 04/07/2009 for the course ECEN 2250 taught by Professor Mathys during the Fall '07 term at Colorado.
- Fall '07