Chapter 2 Circuit Elements.

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Presentation transcript:

Chapter 2 Circuit Elements

Figure (a) An incandescent lamp. (b) Voltage–current relationship for an incandescent lamp. The lamp is linear within the range  i m  i  i m. i-v characteristic

Wirewound resistor Small thick-film resistor chips A 1/4-watt metal film resistor Different types of resistors

Figure (a).Open circuit. (b) Short circuit. Ideal current source i(t) = 0 Ideal voltage source v(t) = 0

Figure (a) An example circuit, (b) plus an open circuit and a short circuit. (c) The open circuit is replaced by a voltmeter, and the short circuit is replaced by an ammeter. All resistance are in ohms.

Other circuit simulators PSPICE (SPICE = Simulation Program with Integrated Circuits Emphasis) TINA (Toolkit for Interactive Network Analysis) Etc.

Figure (a) The symbol and (b) a model for the potentiometer. Transducers : devices that convert physical quantities to electrical quantities

Figure (a) A circuit containing a potentiometer. (b) An equivalent circuit containing a model of the potentiometer.

Other Transducers Temperature sensor Pressure sensor Photo sensor Displacement sensor Etc.

Summary First Electrical Engineer Linear Model Active &Passive Circuit Elements Resistors Independent Sources Dependent Sources Transducers Switches

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