Ece 3710 e circuits and electronics
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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 l.jpg
ECE 3710 E: Circuits and Electronics

Jeff Dugger

Lecture 1: 08/22/00


Introduction to electrical engineering l.jpg

Communication

Computation

Control

Power

Introduction to Electrical Engineering


The sound of music l.jpg

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


Motion and forces l.jpg
Motion and Forces

Force = mass X acceleration


Mass and charge l.jpg

m1

m2

+q1

-q2

-q1

-q2

Mass and Charge

Property: Mass Force: Gravity

Property: Charge Force: Electrostatic

TWO TYPES OF CHARGE:

+ AND -

r


Force fields l.jpg

m

+q

-q

Force Fields

G-Field

E-Field

-Q

ME

ME >> m1

|Q | >> |q|


Potential energy l.jpg

m

+q

-q

Potential Energy

G-Field

E-Field

+ P

+ V

0

0

- P

- V

-Q

ME

Important to define a REFERENCE!


Mass charge flow currents l.jpg
Mass/Charge Flow: Currents

-I

+I

+

Radio/

CD Player

-

kilograms / second

Coulombs / second (Amperes)


Power l.jpg
Power

1 m/s

The rate at which work gets done.

2 m/s


Summary l.jpg
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.


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