PHYS 272 Lecture Notes - Lecture 31: Electromotive Force, Resistor, Capacitor

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cyanwallaby953

29 Aug 2018

School

University of Maryland

Department

Physics

Course

PHYS 272

Professor

Orozco

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Document Summary

Induced electromotive force: notes on circuit diagrams: At t near zero, the current is approximately 0: as time goes on, the circuit reaches its steady state. This means that the current becomes a constant. Then, the electromotive force will only depend on the: formal solution, assume a force generating an electromotive force e0, the electromotive force from the source is: (cid:1856)(cid:1856)(cid:1872) (cid:1872) (cid:4678) (cid:2868) (cid:1872) (cid:1872)(cid:2868)(cid:4679)=(cid:4678)(cid:1872)(cid:4679) = (cid:2868)(cid:1872) resistance and current within the current: (cid:2868)= = (cid:2868)((cid:883) (cid:1857) (cid:3047))=(cid:2868)((cid:883) (cid:1857) (cid:3047)) (cid:1872) (cid:4666)(cid:1872)(cid:4667)=(cid:2868: alternating current (ac) circuits, if the circuit is off at t = 0: (cid:883)(cid:1856) (cid:3047)(cid:3116) (cid:3116) ln((cid:2868))= (cid:4666)(cid:1872) (cid:1872)(cid:2868)(cid:4667) (cid:4666)(cid:1872)(cid:4667)=(cid:2868)(cid:1857)(cid:4666)(cid:3047) (cid:3047)(cid:3116)(cid:4667: energy stored within an inductor: (cid:1847)= (cid:1856)(cid:1872) (cid:4666)(cid:2870)(cid:4667) (cid:3047) (cid:1847)= (cid:1856)(cid:1872)(cid:4666)(cid:2868)(cid:2870)(cid:1857) (cid:2870)(cid:4666)(cid:3047) (cid:3047)(cid:3116)(cid:4667) (cid:3047) (cid:1847)=(cid:883)(cid:884)(cid:2870, recall: power in a circuit =[(cid:4666)(cid:1872)(cid:4667)](cid:2870)=[(cid:1848)(cid:4666)(cid:1872)(cid:4667)](cid:2870, root mean square voltage: (cid:1848)(cid:3045)(cid:3046)= (cid:883)(cid:1846) (cid:1856)(cid:1872) [(cid:1848)(cid:4666)(cid:1872)(cid:4667)](cid:2870) (cid:2869) Also assume that the voltage is a function of the form.

Related Questions

find the amplitude of the current i0 through the voltage source.

To understand the use of phasors in analyzing a parallel AC circuit.Phasor diagrams, or simply phasors, provide a convenient graphical way of representing the quantities that change with time along with .This makes them useful for analyzing AC circuits with their inherent phase shifts between voltage and current. If a quantity I(t) changes with time as , a phasor is a vector whose length represents the amplitude Io(see the diagram). This vector is assumed to rotate counterclockwise with angular speed ; that way, the horizontal component of the vector represents the actual value I(t) at any given moment.In this problem, you will use the phasor approach to analyze an AC circuit.