# Figure 1.1 A telephone system.

EE 1270: Introduction to Electric Circuits
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Lecture 1
Introduction
Chapter 1
Circuit Variables
EE 1270 Introduction to Electric Circuits
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 Power Systems (Classical EE)
1
Generators: nuclear,
hydro (water), thermal (coal,gas)
 Power Lines: transmission lines, distribution
 Grid System and Managment: efficient distribution of
electric power, redundancy to avoid black outs
 EE 4900 (Power Systems (?)) by Dr. Larry Zeng

EE 1270 Introduction to Electric Circuits
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 Control Systems
2
 Regulate and control processes
Control what? temperature (thermostat), pressure, flow
rate (oil refinery), fuel-air mixture in cars, motors, doors,
switches (everywhere), autopilot, sprinkler system and
irrigation system
 EE 4100 (Control Systems) by Dr. Larry Zeng

EE 1270 Introduction to Electric Circuits
Suketu Naik
3
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 Computer Systems
 Computing: Pocket calculators, computers,
supercomputers, embedded processors
 Processors: Central Processing Unit (CPU),
Microcontroller unit (MCU), Digital Signal Processor
(DSP)
 EE 3610 (Digital Systems), EE 3710 (Embedded Systems), EE
4710 (Real-Time Systems) by Dr. Fon Brown
EE 1270 Introduction to Electric Circuits
Suketu Naik
4
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 Signal Processing
 Transform electric signals into information: process
data from satellites, CT scanners, MRI, smart phones
 EE 3210 (Signals and Systems), EE 4210 (Digital Signal
Processing) by Dr. Larry Zeng
EE 1270 Introduction to Electric Circuits
Suketu Naik
5
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 Communication Systems
 Generate, transmit and distribute information: radio,
cell phones/smart phones, satellite communication systems,
radio telescopes, wireless communication
 EE 3110 (Microelectronics I), EE 3120 (Microelectronics II)
by Dr. Justin Jackson, EE 4410 (Communication Circuits and
Systems) by Dr. Chris Trampel
EE 1270 Introduction to Electric Circuits
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
6
 Sensors and Sensor electronics: gather data to be
processed later
 Electromagnetics: classical study of electrostatics
(capacitors), magnetostatics (inductors) and Maxwell’s
equations
EE 1270 Introduction to Electric Circuits
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 It's all related - Multidisciplinary Field
EE 1270 Introduction to Electric Circuits
7
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 It's all related - Multidisciplinary Field
EE 1270 Introduction to Electric Circuits
8
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 It's all related - Multidisciplinary Field
EE 1270 Introduction to Electric Circuits
9
Suketu Naik
EE 1270: Introduction to Electric Circuits
Overview of Electrical Engineering
 It's all related - Multidisciplinary Field
EE 1270 Introduction to Electric Circuits
10
Suketu Naik
Common SI Units
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TABLE 1.2 Derived
Units in SI
EE 1270 Introduction to Electric Circuits
Suketu Naik
Power of Ten
12
TABLE 1.3
Standardized Prefixes to
Signify
Powers of 10
EE 1270 Introduction to Electric Circuits
Suketu Naik
Electric Effects: Voltage and Current
13
Positive Charge
Negative Charge
Voltage is due to separation of Charge=Electric Force
Current is due to motion of Charge=Electric Flow
EE 1270 Introduction to Electric Circuits
Suketu Naik
Figure 1.5 An ideal basic circuit element
EE 1270 Introduction to Electric Circuits
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Suketu Naik
Passive Sign Convention
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+
i
Current flows from positive terminal to negative
terminal (positive charge moves from positive to negative)

It can be a Resistor, Capacitor, Inductor or in general any
circuit element
EE 1270 Introduction to Electric Circuits
Suketu Naik
Assessment Problem 1.3, 1.4
EE 1270 Introduction to Electric Circuits
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Suketu Naik
Figure 1.6 Power
EE 1270 Introduction to Electric Circuits
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Suketu Naik
Problem 1.15
EE 1270 Introduction to Electric Circuits
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Suketu Naik