PHYS 272 Lecture 21: Exam Review
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Phys272 lecture 21: exam review: note: the exam will have no numerical answers, recall, consider a spherical shell with internal charge q and external charge q, recall that: =(cid:2869) resistances: (cid:883)(cid:1844: recall: equivalent capacitance, the equations for capacitors in parallel and in series is the reverse of those of equivalent resistances, in series: In these cases, we are increasing the separation of the plates and therefore we add the inverses of the capacitances to get the inverse of the equivalent capacitance: in parallel: In these cases, we increase the area of the plates, so we add each capacitance together: recall: electrical power, the equation of electrical power given a current i and a potential difference v is: (cid:3044)= (cid:883) (cid:883) =(cid:2869) (cid:1842)=(cid:1848)=(cid:2870)(cid:1844)=(cid:1848)(cid:2870)(cid:1844: sample test, conceptual questions, the same potential difference is applied across two wires. Wire a carries twice the current of wire b.
