Transcription of Chapter 31 – Alternating Current
{{id}} {{{paragraph}}}
Chapter 31 Alternating Current - Phasors and Alternating Currents- Resistance and Reactance- Magnetic-Field Energy- The L-R-C Series Circuit- Power in Alternating - Current Circuits- Resonance in Alternating - Current Circuits- Transformers1. Phasors and Alternating CurrentstVv cos=Ex. source of ac: coil of wire rotating withconstant in a magnetic field sinusoidalalternating cos=v, i = instantaneous potential difference / , I = maximum potential difference / Current voltage/ Current amplitude. = 2 fPhasor Diagrams- Represent sinusoidally varying voltages / currents through the projection of a vector,with length equal to the amplitude, onto a horizontal Phasor:vector that rotates counterclockwisewith constant .Iirav 2=Rectified average Current (Irav): during any whole number of cycles, the total charge that flows is sameas if Current were constant (Irav).- Diode (rectifier): device that conducts better inone direction than in the other. If ideal, R = 0 in one direction and R = in other.
Pav = VI =Vrms Irms. 5. Resonance in Alternating-Current Circuits C LC XL XC L 1 1 0 0 = 0 = ω =
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
{{id}} {{{paragraph}}}