PHYS 105 1nd Edition Lecture 34Outline of Last Lecture I. CapacitorOutline of Current Lecture II. Inductor III. AC Circuit IV. Electric Resonance (RLC Circuit)V. FiltersCurrent LectureI. Inductor - When electric current flows in the wire, it produces a magnetic field - When electric wire is coiled together, the magnetic field is concentrated in the device o This is called an inductor (L)o Unit of inductance is Henry (H)- Inductor stores magnetic field or magnetic energyII. AC Circuit - Root Means Square oVrms=Vmax√2o Peak to peak voltage - When the Ac voltage is applied to a circuit with inductor and capacitor, the impedance (or reactances) of the inductor and capacitor are…oZL=2 πfLoZC=12 πfC- Capacitor: The current leads the capacitor voltage by 90 degrees, or the voltage lags the currents by 90 degrees- Inductor: The current lags the inductor voltage III. Electric Resonance (RLC Circuit)- The electrical resonance circuit can be implemented - Net impedance of an RLC circuit is oZ =√R2+(ZL−ZC)2These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Power dissipated in a circuit is P=IVxcos(φ ¿o Cos(φ ¿=power factor Measures the amount of dissipative part of the power of the circuit IV. Filters- Electronic circuit that allows selective frequency to pass - Low-pass or high-pass filters can be built by RC or RL circuit - Cut off frequencies are:ofC=12 πRCofC=2
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