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ECE 3710 E: Circuits and Electronics. Jeff Dugger. Lecture 1: 08/22/00. Communication. Computation. Control. Power. Introduction to Electrical Engineering. 5. 4. 3. 2. 1. 0. t. t. t 1. t n. The Sound of Music. Analog: Record Player. Digital: Compact Disc Player.

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ECE 3710 E: Circuits and Electronics


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    1. ECE 3710 E: Circuits and Electronics Jeff Dugger Lecture 1: 08/22/00

    2. Communication Computation Control Power Introduction to Electrical Engineering

    3. 5 4 3 2 1 0 t t t1 tn The Sound of Music Analog: Record Player Digital: Compact Disc Player 1, 1, 2, 2, 2, 4, 4, 3, 2, 1

    4. Motion and Forces Force = mass X acceleration

    5. m1 m2 +q1 -q2 -q1 -q2 Mass and Charge Property: Mass Force: Gravity Property: Charge Force: Electrostatic TWO TYPES OF CHARGE: + AND - r

    6. m +q -q Force Fields G-Field E-Field -Q ME ME >> m1 |Q | >> |q|

    7. m +q -q Potential Energy G-Field E-Field + P + V 0 0 - P - V -Q ME Important to define a REFERENCE!

    8. Mass/Charge Flow: Currents -I +I + Radio/ CD Player - kilograms / second Coulombs / second (Amperes)

    9. Power 1 m/s The rate at which work gets done. 2 m/s

    10. Summary • Charge is a fundamental property of matter. • Two types of charge: positive and negative. • Like charges repel, unlike charges attract. • Voltageprovides potential for charges to flow. • Current measures number of charges flowing by in a given time interval. • Power is the rate of energy per time required to move a charge or released by a moving charge. • Circuits are “plumbing for charges”, physical systems for controlling charge flow. • Electrical Engineers design circuits to store and move charge to represent information and to do work.