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Two batteries and three bulbs

Page history last edited by Joe Redish 8 years, 2 months ago

8.5.P24

 

As part of a lab, a student hooked up two 1.5 Volt batteries and three 0.5 Ohm bulbs as shown. For each question, explain how you know the answer, and if you use one or more of the Kirchhoff principles, state them and tell how you used them.


1. If the current in bulb A is equal to I (the letter "I" -- not the number "1"), what is the current in bulb B? (Express your answer in terms of I; don’t find a numerical value.)

 

2. If the current in bulb A is equal to I, what is the current in bulb C? (Express your answer in terms of I; don’t find a numerical value.)

 

3. Can you find the numerical value of I? If you can, find it. If you can’t, explain why not.  

 

4. A second student put the system together as shown in the figure at the right. Would the results be any different from those in part A? If so, how? 

Dave Buehrle 11/6/15

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