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Unformatted text preview: Physics 9C Review–second midterm Chapters 2529 Section 29.7 will not be covered on this midterm. The midterm will mainly test Chapters 2529, although you are responsible for all material covered since the beginning of the term. (I suspect it would be impossible to design a test on Chapters 2529 that didn’t invoke Coulomb’s Law somewhere!) Chapters 2526, which introduce current, is heavy on definitions: current density, J = ne v , for carriers of density n and average velocity v current, I = R S J · da (becomes JA if J is uniform) conductivity, J = σ E resistivity, ρ = 1 /σ resistance of wire, R = ρL/A Know the voltage drop in a resistor ( V = IR ) and the power dissipated in a resistor ( P = IV ). They can be derived from the above definitions, but you won’t need to. Also know Q = CV for a capacitor (Ch 24). Resistorcapacitor circuits involve exponential time dependences, with time constant RC . As the capacitor charges or discharges, the moving charges create a current,...
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This note was uploaded on 04/07/2008 for the course PHY 9C taught by Professor Zieve during the Winter '08 term at UC Davis.
 Winter '08
 Zieve
 Physics

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