-What are you supposed to bring to class? (Ans: book & calculator)
-What are you supposed to bring to lab? (Ans: book, calculator, bound notebook with graph paper, $15 to buy LabNotes)
-The biggest thing you should be able to answer from doing this reading: why in V=IR we apply a constant force but get a constant velocity? This is contrary to physics: F=ma we should have a constant acceleration resulting in a changing velocity!
-How does the resistivity of a metal change with temperature (and why)? What would happen to the conductivity of a circuit (say a computer chip) if you heated it up?
-Review the derivation for J. If J = I/A, where is the area term in J=envdx?
-What are some things that cause an electron to be scattered? What does this do to the electron's velocity?
-What's drift mobility? What is it's units?
-What's the relationship between the mean time between collisions and the probability of being scattered?
-Example 2.2 calculates the free electron concentration and mobility of Cu. How would the free electron concentration of Cu change if the atom had 2 valence electrons? Using the data on page 681, repeat the calculation for Zn instead of Cu (look up the conductivity of Zn).
-How does resistivity change with temperature in a pure metal? Why?
Important terms you should know
-drift velocity
-drift mobility
-scattering
-relaxation time, scattering time
Go to the textbook website and check out these solved problems.