Physics 121: Electricity & Magnetism – Lecture 13 Carsten Denker NJIT Physics Department Center for Solar–Terrestrial Research.

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Presentation transcript:

Physics 121: Electricity & Magnetism – Lecture 13 Carsten Denker NJIT Physics Department Center for Solar–Terrestrial Research

April 18, 2007Center for Solar-Terrestrial Research LC Oscillations

April 18, 2007Center for Solar-Terrestrial Research LC Oscillations (cont.) Damped Oscillation

April 18, 2007Center for Solar-Terrestrial Research Alternating Current/Forced Oscillations Whatever the natural angular frequency  of a circuit may be, forced oscillations of charge, current, and potential difference in a circuit always occur at the driving frequency  d. AC: alternating current DC: direct current  d : driving angular frequency

April 18, 2007Center for Solar-Terrestrial Research Resistive, Capacitive, & Inductive Load Resistor Capacitor Inductor

April 18, 2007Center for Solar-Terrestrial Research Series RLC Circuit

April 18, 2007Center for Solar-Terrestrial Research Series RLC Circuit (cont.) Impedance Current amplitude Phase constant Resonance

April 18, 2007Center for Solar-Terrestrial Research Power in Alternating–Current Circuits RMS current RMS voltage RMS EMF Average power

April 18, 2007Center for Solar-Terrestrial Research Transformers Step–up transformer Step–down transformer Transformation of voltage Transformation of currents Load resistance

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