L5-LC-2009 - Capacitors and Inductors Capacitors Trac D...

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Capacitors and Inductors Capacitors and Inductors Trac D. Tran ECE Department The Johns Hopkins University Baltimore, MD 21218 Outline Outline Introduction Two circuit elements that store energy Passive Capacitor Capacitance. Water model Current, voltage, power, energy for a capacitor Capacitors in series and parallel Examples Inductor Inductance. Water model Voltage, current, power, energy for an inductor Inductors in series and parallel Examples
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Introduction Introduction We have studied several circuit elements so far Current & voltage source: active elements that generate energy Resistor: passive element that dissipates energy Two additional circuit elements: capacitor & inductor Passive elements that store energy Energy reservoirs that capture energy and later return it back to the circuit Applications Photoflash bulb, amplifier, loudspeaker crossover network, LCR resonator in card key, electromagnet, transformer… Capacitor Capacitor Capacitor & Capacitance Construction: separating two sheets of conductor by a thin layer of insulator Variable: C Unit: Farad ( F ). 1F=1 coulomb per volt capacitor
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