12 seriesParallel

12 seriesParallel - Craig Ogilvie Review lecture 11 Mobile...

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Unformatted text preview: Craig Ogilvie Review lecture 11 Mobile charges normally move randomly, but in presence of E-field electrons accelerate, collide, accelerate => net drift Craig Ogilvie 11 d Av q n dt dQ I | | = = - = l d E V A L R IR V =- = Electrons move opposite direction as I Ohms law Craig Ogilvie Goals Understand potential changes in circuit Rate of energy dissipation Power Take ideas of energy and charge conservation Develop methods to solve DC circuits How much current in different branches of a complex circuit Craig Ogilvie 22 Craig Ogilvie Pre-lecture: main idea Craig Ogilvie 33 Battery increases currents potential energy Current loses potential energy in resistors Battery increases potential energy again = circuit V Craig Ogilvie Potential Changes Two identical power supplies each with an internal resistance are connected in series with a resistor. Sketch the potential changes along the circuit Compare with neighbor Craig Ogilvie 44 V R 3 R 2 R 1 V 1 V 2 V 1 V 2 Craig Ogilvie Question: two power supplies, 1st round Craig Ogilvie 55 Two power supplies, each with an emf of 10V, each with...
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12 seriesParallel - Craig Ogilvie Review lecture 11 Mobile...

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