PHY 2049: Physics IISlide 2Slide 3Slide 4Slide 5Slide 6PHY 2049: Class QuizSlide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14PHY 2049: Physics IITutoring Center is open in room NPB 1215, M-F 12:00AM -4:00PM. It is free.Hopefully all homework problems have beensolved. Please see me immediately after the class if there is still an issue.PHY 2049: Physics IIAbout bicycle riding: If some one shows you a trick, it means that,It is possible to do that trickThe person who showed you, can do the trick. It does not mean that you can do the trick.Try it a lot of times and you can too.PHY 2049: Physics IIWhat have we learnedCoulomb’s law, electric field, Gauss’ theorem and electric potential.All comes together in the concept of a capacitor.Capacitor: A device to store charge.PHY 2049: Physics IIPHY 2049: Physics II•Calculate the Electric Field at P•Calculate the el. potential at PPHY 2049: Physics II)(2ln2222zRzddllkrqkrqkVoiii•Point charge•Distribution of charges•Line charge at an edge•Disc on an axis through the centerPHY 2049: Class QuizIf 500 J of work are required to carry a charged particle between two points with a potentialdifference of 20V, the magnitude of the charge on the particle is:A. 0:040CB. 12:5CC. 20CD. cannot be computed unless the path is givenE. none of theseSome old business:What is the electric fieldof a shellof a uniform spherical charge distribution?What is the potential for each of the above?PHY 2049: Physics IISome old businessThe potential of a uniform spherical charge. Calculate electric field, integrate it to get the potentialEVVrRTwo particles with charges Q and -Q are fixed at the vertices of an equilateral triangle with sides of length a. The work required to move a particle with charge q from the other vertex to the center of the line joining the fixed particles is:A. 0B. kQq/aC. kQq/a2D. 2kQq/aE. 1.4kQq/aPHY 2049: Physics IIa= 39 cmq1 = 3.4pCq2 = 6 pCE at the center?What is the potential at the center?PHY 2049: Physics IICapacitors: A device to hold charge.It is held by Coulomb force between the charges. +q and –q on two separate places.V : potential difference: q= CVC: capacitance units farad.PHY 2049: Physics IIPHY 2049: Physics
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