nagle_phys2020_fa07_lecture18

# nagle_phys2020_fa07_lecture18 - Mix up with labs (our...

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1 35 • Mix up with labs (our apologies). This week we will work to develop problem solving skills with circuits in recitation. Attendance is still required. • Reading for last week: Chapter 18, Chapter 19.1-19.3 • Reading for this week: Chapter 19.4-19.5 and 19.7-19.8 • Note that Exam #2 is approaching – October 23 (Tuesday 7:30-9:15 pm in Duane G-1B30) 36 Clicker Question We start with the left circuit with one lightbulb (A). The brightness of the bulb directly reflects the power. If we add a second bulb (B) as shown on the right, what happens to the bulbs? V A V A B A)Bulb A is equally bright. B)Bulb A is dimmer than before C)Bulb A is brighter than before 37 Demonstration with two light bulbs in series. V A B 38 Resistors in Parallel R 1 R 2 R 3 39 R 1 R 2 R 3 V Clicker Question If we connect a battery with V = 6 Volts with three resistors R1 = 10 Ω , R2 = 20 Ω , R3 = 30 Ω , which of the following is true? A)The current through each resistor is the same.

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## This note was uploaded on 02/27/2008 for the course PHYS 2020 taught by Professor Dubson during the Fall '06 term at Colorado.

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nagle_phys2020_fa07_lecture18 - Mix up with labs (our...

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