PHY103NPL2W2

# PHY103NPL2W2 - of electron mobility 3)What does it mean...

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P2.W2 – DC Circuits Main concepts:  conductivity, current, resistance, Ohm's law Serway Text: Ch. 25, 27, 28 Concepts 1) If you were to plot the voltage vs. the current for a given circuit, what would you expect the slope of the line to be? If now the resistance of the circuit were a function of temperature would you still expect to see a straight line when plotting V vs. I, if the temperature was allowed to vary?  2) What is a conductor?  How is the conductivity related to resistance? How does conductivity of a regular conductor (like a copper wire) change with temperature? Why? (Hint: explain in terms
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Unformatted text preview: of electron mobility.) 3)What does it mean physically for something to have “resistance”? What does it mean for a battery to have “internal resistance”? How can the internal resistance r be determined from measurement of the voltage V across the terminals of a battery and the current I through an external resistor R, where ℇ is the EMF of the battery? Please explain using using sentences, diagrams, and equations. Make sure you consider plotting the data as in Question 1....
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## This note was uploaded on 04/13/2009 for the course PHY 103n taught by Professor Lab during the Spring '08 term at University of Texas.

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