Lets start with three very basic concepts of electricity. Electricity is the flow of electrons in a conductor from one atom to the next atom in the same general direction. No single discovery has affected our lives, our culture and our survival more than electricity. A third factor that plays a role in an electrical circuit is resistance. We make electricity by creating an electric circuit. Basic electricity test study guide skill and knowledge checklist section 1 january 1999 page 1 introduction overview this study guide is designed to familiarize you with the basic electricity. Panoramic photos of tucson taken from the top of tumamoc hill just west of tucson were used to provide an overview of tucson street lighting. Each category was compiled from various publications, reports and data that the eia publishes either weekly, monthly or annually. When an electric circuit flows through a conductor, a magnetic field or flux develops around the conductor. The amount of resistance depends upon the composition, length, crosssection, and temperature of the resistive. Unfortunately, you cant adjust the thickness of an already thin wire.
An understanding of these principles is essential for comprehension of oshas electrical safety standards. The current density, which we have defined as the current thr ough unit ar ea nor. How did we define voltage in terms of electron movement. Static electricity is the buildup of negative charge due to friction whats it all. Basic electricity fall 2011 this course module introduces the basic physical models by which we explain the flow of electricity. We would like to encourage students, teachers, instructors, trainees, architects, engineers, professors and researchers to visit this site regularly. Electricity is all around uspowering technology like our cell phones, computers, lights, soldering irons, and air conditioners. Oct 18, 2017 in this video we learn how electricity works starting from the basics of the free electron in the atom, through conductors, voltage, current, resistors, led, to capacitors and transformers. Understanding electricity requires knowledge of these basic electrical terms. A contractors easy guide to hvac circuits, controls, and wiring diagrams practical is good p. The amount of push is the voltage measured in volts. Static electricity is the buildup of negative charge due to friction whats it all about.
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. The electrical science handbook consists of fifteen modules that are contained in four volumes. Nam june paik, one of the pioneers of the field of electronic art, makes this distinction very clear by commenting on electricity and electronics. This instructable will hopefully demystify the basics of electronics so that anyone with an interest in building circuits can hit the ground running. Electricity basics the information contained within this section has been provided by the energy information administration eia, the us governments agency that collects data on all aspects of. Earlier on,we discussed how electricity is generated at the power station. Updated quizzes and questions for electrician electrical. Volume 1 of 4 module 1 basic electrical theory this module describes basic electrical concepts and introduces electrical terminology. Flow of electric current through a conductor experiences a certain amount of resistance. The handbook includes information on alternating current ac and direct current dc theory, circuits, motors, and generators.
Our system will remember the last page you viewed when logging out and back in but please do not exit out. This module will cover the fundamentals of electricity in a practical way, and will not be complicated by complex theory and mathematical calculations. Basic electrical engineering pdf notes bee pdf notes. You will be introduced to information that will be used in later. After all, the whole purpose of electronics is to get electricity to do useful and interesting things. A basic understanding of electricity and electrical systems is. The oneline diagram shows the necessary basic information about the sequence of a circuit but does not give the detailed information that is found in a. Understanding electricity even though basic electrical theory was not understood until much later, electricity has existed in the world since the beginning of time. To understand the fundamentals of electricity, we need to begin by focusing in on atoms, one of the basic building blocks of life and matter. Basic electricity test study guide skill and knowledge checklist section 1 january 1999 page 1 introduction overview this study guide is designed to familiarize you with the basic electricity knowledge and skills required by bellsouths technical jobs and covered by the basic electricity test. Basic electricity fundamentals information in power and. When electrons enter at one end of a resistor, some of the electrons collide with atoms within the resistor.
Included are objectives, instructor guides, student. Electronics is the processing of electrical charges as information. Basic electronics chapter 2, 3a test t5, t6 basic electrical principles and the functions of components figures in this course book are reproduced with the permission of the american radio relay league. Electrons can flow through any material, but does so more easily in some than in others. The following is a brief description of the information presented in each module of the handbook.
Be sure that parts with positive or negative markings. The circuit for the electricity to flow round needs to be built of. Ammeter an instrument for measuring the flow of electrical current in amperes. The type of electricity that is used to power things we use is called current electricity. It will also familiarize you with the test, help you. Getting started with basic electronics is easier than you might think. In order to understand even the simplest concepts of electronics, you must first understand what electricity is. Electricity is the flow of electrons from one place to another. This flow of electrons is referred to as current and is designated by the symbol i. In this video we learn how electricity works starting from the basics of the free electron in the atom, through conductors, voltage, current, resistors, led, to capacitors and transformers. The edison tech centers diverse material covers the engineering and applications side of electricity the fun part. It is analogous to the viscous friction element of mechanical system. Ammeters are always connected in series with the circuit to be tested. The concept of electricity is both familiar and mysterious.
Basic electricity fundamentals information in power and energy. We encourage you also to bookmark and share this to your friends. How did we define current in terms of electron movement. Basics on electricity and electrical generation ej moyer, u. A chemical reaction inside the battery works like a pump to push electricity. Lets take the case where you are turning on a light in your house.
One big headache for the power company is that when electricity travels in wires, it loses energy. These atoms start vibrating and transfer their energy to neighboring air. Suffice it to say that two of the tiny particles that make up atoms protons and electrons are the bearers of electric charge. The book incorporates the requirements of the latest regulations, particularly. Resistance is the property of a circuit, component, or material that opposes current flow. Knowledge of the fundamentals of electricity and application is increasingly necessary not only for those of us who work in the electric power industry, but also for the general public. Electricity from the wall outlets in your house powers your television, computer, lights, and microwave. Even when you try to escape electricity, its still at work throughout nature, from the lightning in a thunderstorm to the synapses inside our body.
Information is data processed for some purpose information can only be considered to be real info if it meets certain criteria i. The module will present a number of different to pics. Cell phones, flashlights, and even a cars headlights are powered by the electricity in batteries. Intro to electricity nyu tandon school of engineering. We encourage you also to bookmark and share this to your. Electrical current is described as a flow of electrons. This power station may be many hundred miles kilometers from your home or hospital and this means that the electricity has to travel very far before reaching you. The bohr model of an atom a nucleus surrounded by shells of electrons traveling in discrete orbits is presented. There are times when you want some water but dont need all the water that the pipe can deliver, so you control water flow by adjusting the faucet.
Be sure that parts with positive or negative markings are positioned as shown in the drawings. Here is a simple experiment that will teach you an important. A basic understanding of electricity and electrical systems is necessary for doe nuclear facility operators, maintenance personnel, and the technical staff to. All material resists the flow of electrical current to some extent. In this fourmodule program on electrical fundamentals, we introduce for study the general physics or basic natural laws that govern the use of electricity. Fundamentals of electricity welcome to module 2, fundamentals of electric ity. We all know what electricity is, or at least have a rough. Electricity basics the information contained within this section has been provided by the energy information administration eia, the us governments agency that collects data on all aspects of energy. An understanding of these principles is essential for comprehension of.
Introduction chapter 1 direct current direct current basics dc circuits magnetism chapter 2 alternating current alternating current basics inductance and capacitance ac circuits transformers final exam if you do not have a basic. Joule, wa to unit conversions and basic problems involving current and voltage. Alternating current ac an electric current that reverses its direction many times a second at regular intervals. This power station may be many hundred miles kilometers from your home or hospital and this means that the electricity has to. Long before anyone heard the word electricity, people had seen lightning and experienced shocks from electric fish. From its beginnings in the late nineteenth century, electrical engineering has blossomed from focusing on electrical circuits for power, telegraphy and telephony to focusing on a much broader range of disciplines.
We are going to use a battery to provide the electrical potential. Build an intuitive understanding of current and voltage, and power. Information is data processed for some purpose information. In early days, electricity was considered as being unrelated to magnetism. Basic electricity including electrical definitions, ohms law, and electrical circuit information including direct and alternating current. Then we will step through each of these topics in detail.
We explain concepts like electricity, resistance, voltage, inductors, capacitors, electromagnetism, and more. Be sure that all connections are securely fastened. There are times when you want some water but dont need all the water that the pipe can deliver, so you control water. Basic electrical installation work provides a sound basic knowledge of electrical practice which other trades in the construction industry will. In electronics and electrical technology, a coil is usually known as an inductor. What in the world is electricity and where does it go after it leaves the toaster. Winkler, basics of electricityelectronics workshop, p.
Home download center electrical engineering books and technical guides siemens basics of energy and automation guides the basics of electricity for students elements of an atom all matter is. People depend on electricity constantly, and when the power goes out in a storm or theres a tripped breaker or another problem in an electrical circuit. Lets explore electricity basics electricity is the flow of electrons or negative charge. Electricity is a basic part of nature and it is one of our most. Electric charge refers to a fundamental property of matter that even physicists dont totally understand. Most circuit problems are due to incorrect assembly, always double check that your circuit exactly matches the drawing for it. The highest flux density occurs when the conductor is formed into a coil having many turns.