MEEN 225 Lecture Notes - Lecture 12: Kirchhoff'S Circuit Laws, Phasor, Angular Frequency

• School: Texas A&M University
• Department: Mechanical Engineering
• Course: MEEN 225
• Professor: John Steven Haglund

Document Summary

There are 2 fundamentals laws that are important in ac circuits o ohm"s law. States that the current through a conductor btwn 2 points is directly proportional to the potential difference across the 2 points, and is inversely proportional to the resistance between them. R- resistance in ohms ( : kirchoff"s laws. States that the algebraic sum of all voltages around any closed loop is zero . States that the algebraic sum of currents at a node is zero . Means voltage signal is in alternating current form (ac) that has positive & negative portions. Angular frequency in rad/s = 2 f f- supply frequency in hz. Vm sin ( t + ) is a signal that leads the original signal by an angle of . Is the angle between v & i. Rms voltage: stands for root-mean-square, in ac cct, current & voltages are generally stated as rms values instead of maximum values.