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Unformatted text preview: 2.3 Construction ofa Ciftuit !1odet 3 5 but in practical switches, contact resistance may be high enough to inter- fere with proper operation ofthe system. Our model does not predict tlis behavior. We also assumed that the coiled connector exerts enough pres- sure to eliminate any contact iesistance between the dry cels. Our model does not predict the eflect of hadequate pressure. Our use of an ideal voltage source ignores any internal dissipation of energy in the dry cells, which might be due to the parasitic heating just mentioned. We could account foi this by adding an ideal resistor between the source and the lamp resistor. Our model assumes the internal loss to be negligible. In modelhg the flashlight as a c cuit, we had a basic understanding of and access to the internal components of the system. However, sometimes we know only the terminal behavior of a device and must use this infor mation in constructing the model. Example 2.5 explores such a modeling problem....
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This note was uploaded on 07/05/2010 for the course EE 100 taught by Professor Boser during the Spring '07 term at University of California, Berkeley.
- Spring '07