Physical Science. Chp 22: Electricity
|
|
- Ernest Wilkerson
- 6 years ago
- Views:
Transcription
1 Physical Science Chp 22: Electricity
2 Yes, we all know what electricity is, but exactly what is it? -where does it come from -can you see it -how is it created
3 Electricity Electricity is a force created by a difference in charges (+ & -) due to gained or lost electrons. (an electron is a negatively charged particle.) When electricity is flowing between two points, this is actually electrons moving from point A to point B. This is called an electrical current.
4 In order for these electrons to flow, however, there must be a difference in charges (# of electrons built up) between the 2 points. Just like heat flow needs a difference in temperatures. Electricity always flows from a location with a negative charge to a location with a positive charge. (like charges repel, opposites attract) - +
5 Think of a battery, the top has a + charge and the bottom has a negative charge. So when they are connected, electrons flow from the bottom to the top.
6 Static Electricity You may have noticed that if you walk across the carpet in socks, and then touch your cat s nose, it will shock him/her (it). This is because, you picked up some free electrons walking over the carpet (kind of like dust), and therefore gained a negative charge.
7 Touching kitty s nose allows you to dissipate that charge (send the extra electrons to an area with fewer electrons, negative to positive) The shock will continue until both surfaces are at the same charge (neutralized)
8 Static electricity is a temporary 1 time charge produced by an excess of electrons. Electrons in the air will attach to moisture in the air. That s why very dry air (like in the winter, or in the dryer) may hold a large number of free electrons, because there s not much moisture for them to attach to. i.e. There s more static in the air in the winter because there are more free electrons just floating around
9 Voltage The difference in charges between 2 points is called the voltage. 2 points can both have a tremendous charge, but if the charge is the same then there will be no flow of electrons between them
10 The number of electrons actually flowing through a conductor is called the current, and is measured in amperes (amps). 1 amp = 6.25 x electrons per sec. (6,250,000,000,000,000,000!)
11 So let s say that using a voltmeter you determine that there are no electrons flowing from point A to point B through an extension cord connecting the two. Does that mean it is safe for you to touch either of the 2 points? Hmmm
12 No! There may be no electrons flowing because the charges are the same. However, your charge may be much different, which would allow the electricity to flow into you.
13 Conductors and Insulators Although an electric current can occasionally jump from 1 point to another, it normally travels through a conductor. A conductor is any material which allows electrons (electricity) to flow easily through it. Metals in general are good conductors of electricity.
14 Insulators are materials which prevent the flow of electrons (electricity). Some good insulators include rubber, glass, wood, and plastic. Any type of electric cord usually consists of a metal conducting wire surrounded by a layer of rubber or plastic insulation.
15 Resistors Materials called resistors can slow the flow of electricity, without stopping it all together. Almost all materials, even good conductors, provide at least a small amount of resistance to an electric current. Resistance is measured in ohms. W
16 Ohm's law magic triangle
17 Voltage measured in volts, symbolized by the letters "E" or "V". Current measured in amps, symbolized by the letter "I". Resistance measured in ohms, symbolized by the letter "R".
18
19
20
21 a A
22 The force or pressure behind electricity
23
24 Direct Current (DC) In most electrical circuits, the current will flow in only 1 direction. This is called direct current or DC. Examples of direct current include batteries, lightning, and static electricity.
25 Lightning Lightning is a form of direct current (DC) produced by static electricity in clouds. The static is formed when air molecules move past each other (just like clothes in a dryer).
26 The negative charges group at the bottom of the cloud and transfer electrons to the ground, which has taken on a positive charge. Why do you think the ground has taken on a positive charge?
27 Alternating Current (AC) An alternating current will send a flow of electrons in 1 direction through a circuit, and then it will reverse the flow in the other direction. Household outlets are an example of AC current. They reverse the direction of the current about 120 times per second.
28 Batteries Electric motors are usually specified to run on either alternating current or direct current (produced by batteries). A battery is a device which produces a continual direct current, through a chemical reaction.
29 A chemical reaction inside the battery pulls electrons away from 1 of the terminals and gives them to the other. This causes 1 terminal to be negative (-) and the other to be positive (+). When these terminals are connected through a device, they produce a flow of electrons from negative to positive, which power the device.
30
31 Electric Circuits A circuit is a pathway along which an electric current can travel, en route to a device. Locating a device along that pathway will allow it to be powered by the electric current. There are 2 different types of circuits: series and parallel.
32 Series Circuit A series circuit is one which has only 1 pathway for electricity to flow. All devices are located along this single pathway, and any break in the circuit will stop the flow of electricity. Ex.: old type Christmas tree lights
33 Parallel Circuits A parallel circuit has multiple paths which the electricity can travel down, with different devices along the different paths. If one pathway is open or broken, the others can still carry electricity. Ex.: newer Christmas tree lights, household circuits
34 A short circuit occurs when the current stops short of the intended device, usually because of the circuit being completed prior to reaching the device.
35 A circuit breaker is a device which prevents too much electricity from flowing through a circuit. Breakers can be reset usually with the flip of a switch.
36 Fuses do the same thing as a breaker, but they use a small wire connector which will burn out if the flow of electricity is too high. Fuses usually have to be replaced after they burn out. Fuses are often found in electric appliances also.
37 An automated external defibrillator (AED), which is similar to the manual defibrillator often seen used by EMT s, is a portable device used to diagnose and treat victims of cardiac arrest. How do you think this device works?
38 Most patients, when they become pulseless go through a brief period in which the heart goes into a chaotic quivering due to erratic electrical activity. This is called ventricular fibrillation (VF). VF eventually deteriorates into a total absence of electrical activity, often around ten to fifteen minutes after arrest. The best chance to regain a pulse is when a patient in recent VF is shocked quickly - ideally in less than 4-6 minutes after arrest. An AED delivers electrical current through heart muscle, temporarily ceasing all electrical activity in the heart, hoping that when that electrical impulse returns, it will return in an organized pumping action instead of VF.
39 Why do you think most gas pump handles are coated in either rubber or plastic?
40 Electric Power The rate at which electrical energy is converted into other forms of energy Electric Power Equation P=IV Power (watts)= current (amperes) X voltage (volts)
41
Electricity Unit Review
Science 9 Electricity Unit Review Name: General Definitions: Neutral Object Charge Separation Electrical Discharge Electric Current Amperes (amps) Voltage (volts) Voltmeter Ammeters Galvanometer Multimeter
More informationChapter: Electricity
Chapter 13 Table of Contents Chapter: Electricity Section 1: Electric Charge Section 2: Electric Current Section 3: Electrical Energy 1 Electric Charge Positive and Negative Charge Atoms contain particles
More informationElectricity. Chapter 20
Electricity Chapter 20 Types of electric charge Protons + charge Electrons - charge SI unit of electric charge is the coulomb (C) Interactions between charges Like charges repel Opposite charges attract
More information4 Electric Circuits. TAKE A LOOK 2. Identify Below each switch, label the circuit as a closed circuit or an open circuit.
CHAPTER 17 4 Electric Circuits SECTION Introduction to Electricity BEFORE YOU READ After you read this section, you should be able to answer these questions: What are the three main parts of a circuit?
More informationHow is lightning similar to getting an electric shock when you reach for a metal door knob?
How is lightning similar to getting an electric shock when you reach for a metal door knob? Electricity Electric charges are from protons, which are positive (+) and electrons, which are negative (-).
More informationLesson 2: Electrical Safety Ladders can become electrified if they come into contact with electric wires. Don't raise a ladder close to electric
Lesson 2: Electrical Safety Ladders can become electrified if they come into contact with electric wires. Don't raise a ladder close to electric lines. Never touch hanging or broken wires. Don't trim trees
More informationWhat is represented by this BrainBat?
What is represented by this BrainBat? What is represented by this BrainBat? Hint: Say what you see. What is represented by this BrainBat? Hint: Say what you see. Answer: Octopi Electricity and Magnetism
More informationElectricity and Magnetism. Module 6
Electricity and Magnetism Module 6 What is electricity? The collection or flow of electrons in the form of an electric charge What is static electricity? When two objects rub against each other electrons
More informationElectricity MR. BANKS 8 TH GRADE SCIENCE
Electricity MR. BANKS 8 TH GRADE SCIENCE Electric charges Atoms and molecules can have electrical charges. These are caused by electrons and protons. Electrons are negatively charged. Protons are positively
More informationELECTRICAL SAFETY. Safety Training For The Non-Qualified
ELECTRICAL SAFETY Safety Training For The Non-Qualified LANGUAGE OF ELECTRICITY Electricity: Negatively Charged Particles Moving Over A Conductor Current: Movement Of Electrons Along A Conductor Ground
More informationElectricity. Electric Charge. Before You Read. Read to Learn. Positive and Negative Charges. Picture This. section.
chapter 6 Electricity 1 section Electric Charge What You ll Learn how electric charges exert forces about conductors and insulators how things become electrically charged Before You Read Think about some
More informationIntroduction to Electricity & Electrical Current
Introduction to Electricity & Electrical Current Physical Science Georgia Performance Standards: SPS10a. Investigate static electricity in terms of friction, induction, and conduction. SPS10b. Explain
More informationUNIT 4 Electrical Applications
UNIT 4 Electrical Applications Topic How do the sources used 4.1 to generate electrical energy compare? (Pages 244-51) Topic 4.1: How do the sources used to generate electrical energy compare? Topic 4.6:
More information11.1 CURRENT ELECTRICITY. Electrochemical Cells (the energy source) pg Wet Cell. Dry Cell. Positive. Terminal. Negative.
Date: SNC1D: Electricity 11.1 CURRENT ELECTRICITY Define: CIRCUIT: path that electrons follow. CURRENT ELECTRICITY: continuous flow of electrons in a circuit LOAD: device that converts electrical energy
More informationHOW IS ELECTRICITY PRODUCED?
ELECTRICITY HOW IS ELECTRICITY PRODUCED? All electricity is produced from other sources of energy. Hydroelectricity is produced from the stored energy of water held back by a dam. As the water runs downhill
More informationSPS10. Students will investigate the properties of electricity and magnetism.
ELECTRICITY SPS10. Students will investigate the properties of electricity and magnetism. a. Investigate static electricity in terms of Friction Induction Conduction b. Explain the flow of electrons in
More informationElectricity and Magnetism
Electricity and Magnetism What is electricity? The collection or flow of electrons in the form of an electric charge What is static electricity? When two objects rub against each other, electrons transfer
More informationParts of an atom. Protons (P + ) Electrons (e - ) Neutrons. Have a positive electric charge. Have a negative electric charge
Electricity Parts of an atom Protons (P + ) Have a positive electric charge Electrons (e - ) Have a negative electric charge Neutrons Are neutral Have no charge Electric Charge In most atoms, the charges
More informationScience Part B Chapter 4- Electrical Energy. Lesson 1-
Science Part B Chapter 4- Electrical Energy Lesson 1- Most atoms have equal numbers of protons, which are positively charged, and electrons, which are negatively charged. These atoms have no charge; they
More informationElectricity Electric Current current. ampere. Sources of Current
Electricity The basis for the study of electricity begins with the electron. It is a small, negatively charged particle located outside the nucleus in all atoms. The nucleus of the atom is positively charged
More information18.5. Electrical Circuits and Safety
18.5 Electrical Circuits and Safety Electrical Circuits An electric circuit is a complete path through which a charge can flow. This is called a closed circuit. When the electric current cannot flow, this
More informationScience Olympiad Shock Value ~ Basic Circuits and Schematics
Science Olympiad Shock Value ~ Basic Circuits and Schematics Use a single D battery, a single bare wire and a light bulb. Find four different ways to light the light bulb using only a battery, one wire
More informationChapter Assessment Use with Chapter 22.
Date Period 22 Use with Chapter 22. Current Electricity Understanding Concepts Part A Use each of the following terms once to complete the statements below. ampere electric current potential difference
More informationCurrent Electricity. 3 rd Years
Current Electricity 3 rd Years Comparing: Flow of electricity to flow of water. Electric Current An electric current is a flow of electric charge. An electric current is caused by the flow of electrons
More informationWhat is included in a circuit diagram?
Circuit Diagrams What is included in a circuit diagram? Circuit diagrams use symbols to represent parts of a circuit, including a source of electrical energy and devices that are run by the electrical
More information4 Electric Circuits. TAKE A LOOK 2. Identify Below each switch, label the circuit as a closed circuit or an open circuit.
CHAPTER 1 4 Electric Circuits SECTION Introduction to Electricity BEFORE YOU READ After you read this section, you should be able to answer these questions: What are the three main parts of a circuit?
More information8.2 Electric Circuits and Electrical Power
8.2 Electric Circuits and Electrical Power Every electrical device uses current to carry energy and voltage to push the current. How are electrical devices designed? What types of parts are used in an
More informationIncandescent Lightbulb. Electricity passes through a tungsten (W) filament, which in turn glows white hot (4500F).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 Incandescent Lightbulb Electricity passes through a tungsten (W) filament, which in turn glows white hot (4500F). Very inefficient: 90% of the electrical energy is lost
More informationElectrical Hazard Three factors determine the resistance of a substance to the flow of electricity: conductors insulators extreme caution
Electrical Safety Electrical Hazard Three factors determine the resistance of a substance to the flow of electricity: What it is made of. Its size. Its temperature. Substances with very little resistance
More informationUnit 3 Lesson 2 Electric Current. Copyright Houghton Mifflin Harcourt Publishing Company
Current Events What is an electric current? Electrical energy is the energy of electric charges. In most devices that use electrical energy, the electric charges flow through wires. The rate of flow of
More informationCHAPTER OUTLINE CHAPTER RESOURCES
Electricity NEW the BIG idea Moving s transfer energy. 5.1 5.2 Charges can move from one place to another. 5.3 Electric current is a flow of charge. Electric charge is a property of matter. Electrons have
More informationINTERACTIVE SCIENCE 2A
INTERACTIVE SCIENCE 2A Workbook Solutions (Enrichment Edition) Chapter 8 MAKING USE OF ELECTRICITY Part A Sectional Exercise 8.1 & 8.2 Concept checking p.35 1. False 2. True 3. False 4. True 5. True Questions
More informationPhysics - Chapters Task List
Name Hour Physics - Chapters 34-35 Task List Task In Class? (Yes/No) Date Due Grade Lab 33.1 - Wet Cell Battery Yes */15 * Vodcast #1 Electric Circuits & Ohm s Law /21 Worksheet Concept Review #1-12, Ch
More information45 Current Electricity. February 09, Current Electricity. What we will learn, Arc Attack. Electric Man. 1
Current Electricity What we will learn, Arc Attack Electric Man www.mrcjcs.com 1 Conductors and Insulators An electric current is a flow of electric charge. Set up a simple electrical circuit and insert
More informationSection 3 Electric Circuits
Section 3 Electric Circuits As You Read What You'll Learn Explain how voltage, current, and resistance are related in an electric circuit. Investigate the difference between series and parallel circuits.
More informationAlternating Current (AC) Electricity
Alternating Current (AC) Electricity Alternating current or AC electricity is the type of electricity commonly used in homes and businesses throughout the world. While the flow of electrons through a wire
More informationCurrent Electricity. GRADE 10 PHYSICAL SCIENCE Robyn Basson CAPS
Current Electricity GRADE 10 PHYSICAL SCIENCE Robyn Basson CAPS What is current electricity? The flow of moving charge, usually carried by moving electrons in a wire. Circuits A path in which charges continually
More informationMore Complex Circuit
Series and Parallel Circuits Circuits usually include three components. One is a source of voltage difference that can be provided by a battery or an electrical outlet. Another is one or more devices that
More informationUnderstanding RV Electrical Hazards. Do you really want to plug in here?
Understanding RV Electrical Hazards Do you really want to plug in here? John Slaughter RV owner for 12 years, 150,000 miles of travel. Electrical Engineer Full disclosure, I am not a safety expert. Takeaways
More informationELECTRICAL. CDTA Technical Training Center
ELECTRICAL ATOMIC STRUCTURE Protons positive charge Electron negative charge Neutron - neutral Electricity is the movement of electrons from atom to atom ELECTRON FLOW CONDUCTOR - Materials which have
More informationElectrical Circuits Discussion Questions:
Electrical Circuits Discussion Questions: 1) What is electricity? 2) How does an electrical circuit work? 3) What types of materials conduct electrical energy? 4) How is electrical energy measured? 5)
More informationNew Section: Circuits & Machines. Warm Up: 1.) How do we use electricity every day? 2.) What do you think of when you hear the word "current?
New Section: Circuits & Machines. Warm Up: 1.) How do we use electricity every day? lights, computers, electronics, tvs, microwaves, etc... new, flowing...? 2.) What do you think of when you hear the word
More informationCHAPTER 19 DC Circuits Units
CHAPTER 19 DC Circuits Units EMF and Terminal Voltage Resistors in Series and in Parallel Kirchhoff s Rules EMFs in Series and in Parallel; Charging a Battery Circuits Containing Capacitors in Series and
More informationName: Base your answer to the question on the information below and on your knowledge of physics.
Name: Figure 1 Base your answer to the question on the information below and on your knowledge of physics. A student constructed a series circuit consisting of a 12.0-volt battery, a 10.0-ohm lamp, and
More informationElectrical power. Objectives. Assessment. Assessment. Equations. Physics terms 5/27/14
Electrical power Objectives Use the equation for electrical power to solve circuit problems. Understand basic concepts for home electricity usage and wiring. Calculate the power used by electric circuit
More information16.3 Ohm s Law / Energy and Power / Electric Meters
16.3 Ohm s Law / Energy and Power / Electric Meters Voltage Within a battery, a chemical reaction occurs that transfers electrons from one terminal to another terminal. This potential difference across
More informationHow are lightning and the shock your brother gives you after rubbing his feet on the carpet the same and how are they different?
Standard IV, Objective I Fifth Grade Compare and Contrast How are lightning and the shock your brother gives you after rubbing his feet on the carpet the same and how are they different? You re a thoughtful
More informationTROUBLESHOOTING AND MAINTAINING ELECTRONIC KILN CONTROL SYSTEMS
TROUBLESHOOTING AND MAINTAINING ELECTRONIC KILN CONTROL SYSTEMS Tom Salicos American Wood Dryers Clackamas, Oregon After many years of helping American Wood Dryers' customers troubleshoot dry kiln control
More informationUnit P.2, P2.3. Currents in electric circuits E ½. F Fuel gauge indicator. Fuel tank. Ammeter. Float. Battery. Sliding contact. Pivot 12V.
Currents in electric circuits 1. The diagram shows the fuel gauge assembly in a car. The sliding contact touches a coil of wire and moves over it. The sliding contact and the coil form a variable resistor.
More informationElectric Current. Electric current: is the movement of electrons from a negative terminal back to the positive terminal of a battery.
Electric Current Electric current: is the movement of electrons from a negative terminal back to the positive terminal of a battery. Electric Current Electrons flow from regions of high Potential Energy
More informationCircuit Basics and Components
Circuit Basics Electric circuits are arrangements of conductors and components that permit electrical current to flow. A circuit can be as simple as a battery and lamp or as sophisticated as a computer.
More informationSeries circuits. The ammeter
Series circuits D o you remember how the parts of the torch on pages 272 3 were connected together? The circuit contained several components, connected one after the other. Conductors, like the metal strip
More informationClass X Chapter 09 Electrical Power and Household circuits Physics
EXERCISE- 9 (A) Question 1: Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time. Solution 1: Electrical energy,
More informationUsing Electricity. Summary Notes. 1. From the Wall Socket Household appliances. Earth wire and safety.
Using Electricity Summary Notes Section Content 1. From the Wall Socket Household appliances. Earth wire and safety. 2. Alternating and Direct Battery and transformer. Current Circuit diagrams. Current
More informationElectromagnetism Junior Science. Easy to read Version
Electromagnetism Junior Science Easy to read Version 1a Electricity is a form of Energy Electricity is a type of energy. It can be transformed from many other types of energy; kinetic, chemical, nuclear
More informationElectric Circuits. Say Thanks to the Authors Click (No sign in required)
Electric Circuits Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit www.ck12.org
More informationreflect energy: the ability to do work
reflect Have you ever thought about how much we depend on electricity? Electricity is a form of energy that runs computers, appliances, and radios. Electricity lights our homes, schools, and office buildings.
More informationAP Physics B Ch 18 and 19 Ohm's Law and Circuits
Name: Period: Date: AP Physics B Ch 18 and 19 Ohm's Law and Circuits MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A device that produces electricity
More informationWhat is Electricity? Lesson one
What is Electricity? Lesson one Static Electricity Static Electricity: an electrical charge that builds up on an object Most of the time, matter is electrically neutral. The same number of positive and
More informationCircuit Notes. Def: 1. Power supply:
Circuit Notes Def: Parts of a circuit 1. Power supply: Types: 1- photovoltaic cell: generates current when exposed to light. ex: solar calculator or watch. 2- Batteries and generators. 2. Wires: 3. Switch
More informationCircuits. What are circuits?
Circuits Circuits What are circuits? A closed loop made of a conducting substance that allows electrons to flow from the negative terminal to the positive terminal Parts of a Circuit 1 Power Supply Provides
More informationChapter 28. Direct Current Circuits
Chapter 28 Direct Current Circuits Direct Current When the current in a circuit has a constant magnitude and direction, the current is called direct current Because the potential difference between the
More informationPeriod 11 Activity Sheet Solutions: Electric Current
Period 11 Activity Sheet Solutions: Electric Current Activity 11.1: How Can Electric Charge Do Work? Your instructor will demonstrate a Wimshurst machine, which separates electric charge. a) Describe what
More informationUnit 3 Lesson 3 Electric Circuits. Copyright Houghton Mifflin Harcourt Publishing Company
A Complete Circuit What are the parts of an electric circuit? An electric circuit is a complete, closed path through which electric charges can flow. All electric circuits contain three basic parts: an
More informationFarr High School NATIONAL 4 PHYSICS. Unit 1 Electricity and Energy. Revision Notes
Farr High School NATIONAL 4 PHYSICS Unit 1 Electricity and Energy Revision Notes Content Practical electrical and electronic circuits - Measurement of current, voltage and resistance using appropriate
More informationStudent Exploration: Advanced Circuits
Name: Date: Student Exploration: Advanced Circuits [Note to teachers and students: This Gizmo was designed as a follow-up to the Circuits Gizmo. We recommend doing that activity before trying this one.]
More information7J Electrical circuits Multiple-choice main test
For each question, circle the correct answer. Question 1 A switch turns off a torch by... A) breaking the circuit B) making the circuit C) shorting the circuit D) turning a series circuit into a parallel
More informationChapter 13Electric Circuits
Chapter 13Electric Circuits Suppose you had a stationary bicycle that was connected to a light bulb, so that when you pedal the bicycle, the energy from the turning wheels lights the bulb. How fast would
More information7.9.2 Potential Difference
7.9.2 Potential Difference 62 minutes 69 marks Page 1 of 20 Q1. A set of Christmas tree lights is made from twenty identical lamps connected in series. (a) Each lamp is designed to take a current of 0.25
More informationCONDUCTION AND INDUCTION. Lesson 3
CONDUCTION AND INDUCTION Lesson 3 Electroscopes An electroscope is an instrument that can be used to detect static charge. The study of static electric charges is called electrostatics. The electroscope
More informationFrog's leg Batteries. Current flow of electric charge. L 26 Electricity and Magnetism [3] Batteries use chemical energy to produce electricity
L 26 Electricity and Magnetism [3] Electric circuits what conducts electricity what doesn t conduct electricity Current voltage and resistance Ohm s Law Heat in a resistor power loss Making simple circuit
More informationA direct current (DC) circuit. Alternating Current (AC) Direct Current DC. AC current. L 27 Electricity and Magnetism [4]
L 27 Electricity and Magnetism [4] A direct current (DC) circuit simple electrical circuits direct current DC Alternating current (AC) vs direct current (DC) electric power distribution household electricity
More informationPHY152H1S Practical 3: Introduction to Circuits
PHY152H1S Practical 3: Introduction to Circuits Don t forget: List the NAMES of all participants on the first page of each day s write-up. Note if any participants arrived late or left early. Put the DATE
More informationBatteries n Bulbs: Voltage, Current and Resistance (8/6/15) (approx. 2h)
Batteries n Bulbs: Voltage, Current and Resistance (8/6/15) (approx. 2h) Introduction A simple electric circuit can be made from a voltage source (batteries), wires through which current flows and a resistance,
More informationL E A R N I N G O U T C O M E S
L E A R N I N G O U T C O M E S What is charge? How does a charge form? Electricity What is an electric current? Y E A R 1 0 C H A P T E R 1 2 What are conductors, insulators and semiconductors? How does
More informationBASIC ELECTRICAL MEASUREMENTS By David Navone
BASIC ELECTRICAL MEASUREMENTS By David Navone Just about every component designed to operate in an automobile was designed to run on a nominal 12 volts. When this voltage, V, is applied across a resistance,
More informationElectricity Notes 3. Objectives
Electricity Notes 3 Objectives Series Circuit There is only one path for the current to travel. bulbs connected in series; when one goes out, they all go out. As you add more bulbs, the brightness of the
More informationELECTRICITY & MAGNETISM - EXAMINATION QUESTIONS (4)
ELECTRICITY & MAGNETISM - EXAMINATION QUESTIONS (4) 1. Which two electrical quantities are measured in volts? A current and e.m.f. B current and resistance C e.m.f. and potential difference D potential
More informationChapter 21 Practical Electricity
Chapter 21 Practical Electricity (A) Electrical Power 1. State four applications of the heating effect of electricity. Home: o Used in electric kettles o Used in electric irons o Used in water heaters
More informationCHAPTER 6.3: CURRENT ELECTRICITY
CHAPTER 6.3: CURRENT ELECTRICITY These components are used in electric circuits. TASK: Draw how you could make this lamp light. Electricity will only flow through a complete circuit. The battery, wires
More informationConceptual Physics Electricity and Circuits Practice Exam 2011
Name: Class: Date: Conceptual Physics Electricity and Circuits Practice Exam 2011 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. In order to form an electric
More informationChapter 19: DC Circuits
Chapter 19: DC Circuits EMF and Terminal Voltage Resistors in Series and in Parallel Kirchhoff s Rules EMFs in Series and in Parallel; Charging a Battery Capacitors in Series and in Parallel RC Circuits
More informationV=I R P=V I P=I 2 R. E=P t V 2 R
Circuit Concepts Learners should be able to: (a) draw, communicate and analyse circuits using standard circuit symbols using standard convention (b) apply current and voltage rules in series and parallel
More informationElectricity Merit Badge
Electricity Merit Badge Class 4 Safety at Home June 13, 2017 Electricity Merit Badge Class 4 2017 National Scout Jamboree 1 Classes Class 1 Basics Electricity Class 2 Magnetism Class 3 Electric Power,
More informationELECTRICITY AND HWH COPPER CONDUCTOR
1. PREFACE +BATTERY TERMINAL +BATTERY TERMINAL + + + + + + + + + + + + ELECTRICITY AND HWH In the first section of this school, we did an in-depth study of general hydraulics. In section four, we applied
More informationRange 16A to 63A. Sensitivity 30mA, 100mA, 300mA, 500mA. Execution Double Pole, Four Pole. Specification IEC / IS : 2000
The flow of current through electrical facilities always involves risks. Poorly insulated equipment, faulty wires and incorrect use of an electrical devise cause currents to flow through the wrong path
More informationElectricity concepts teacher backgrounder
Electricity concepts teacher backgrounder What is electricity, where does it come from and what do we use it for? Scientifically, electricity is the movement of electrons from one atom to another. This
More informationWhy Electric Safety Standards
Paul Haggarty Why Electric Safety Standards To protect patients and caregivers from electrical shock To prevent electrical interference between instrument sub-systems/circuits To prevent electrical interference
More informationMr Cooke s Physics Notes IGCSE Triple Physics 2011 Vers Electricity
Electricity Introduction... 2 Charge, Current, Voltage and Potential Difference... 2 Charge... 2 Current... 2 Voltage... 3 Mains Electricity... 4 Hazards of Electricity... 5 Safety measures... 5 Heating
More informationNever fly a kite near power lines. Visit tampaelectric.com/safety to learn more about electrical safety.
Conductors & Insulators Conductors/Insulators 1 Conductors and insulators are all around us. Those pictured here are easy to identify. Can you describe why each is either a conductor or an insulator? 2
More informationINVESTIGATION ONE: WHAT DOES A VOLTMETER DO? How Are Values of Circuit Variables Measured?
How Are Values of Circuit Variables Measured? INTRODUCTION People who use electric circuits for practical purposes often need to measure quantitative values of electric pressure difference and flow rate
More informationWrite the term that correctly completes the statement. Use each term once. ampere. electric current. resistor battery.
Date Period Name CHAPTER 22 Study Guide Current Electricity Vocabulary Review Write the term that correctly completes the statement. Use each term once. ampere electric current resistor battery kilowatt-hour
More informationAmtek Basic Electronics 1
Page 1 Page 2 Contents Worksheet 1 - Conductors and insulators 3 Worksheet 2 - Circuits 5 Worksheet 3 - Electric current 7 Worksheet 4 - Electromagnetism 9 Worksheet 5 - Electrolysis 11 Worksheet 6 - Switches
More informationThe rod and the cloth both become charged as electrons move between them.
1 polythene rod is rubbed with a cloth. polythene rod cloth The rod and the cloth both become charged as electrons move between them. The rod becomes negatively charged. Which diagram shows how the rod
More informationElectrical Safety - Protecting Yourself Against Electrical Injuries. from NIOSH Electrical Safety Student Manual
Electrical Safety - Protecting Yourself Against Electrical Injuries from NIOSH Electrical Safety Student Manual Oct 9 11:26 AM 1 Electricity is Dangerous There is a risk of an electrical injury - 1. Whenever
More informationFACT SHEET Standard: Electrical Safety
What is a Ground Fault Circuit Interrupter? FACT SHEET The ground-fault circuit interrupter, or GFCI, is a fast-acting circuit breaker designed to shut off electric power in the event of a ground-fault
More informationTHE FOURTH STATE. Gaining a universal insight into the diagnosis of automotive ignition systems. By: Bernie Thompson
THE FOURTH STATE Gaining a universal insight into the diagnosis of automotive ignition systems By: Bernie Thompson Did you know that the forth state of matter powers the spark ignition internal combustion
More informationBasic Electrical Safety
Basic Electrical Safety Concerned About Electricity? How many sets of holiday lights do you plug into one extension cord? Do you still use your hot and sparking electric drill? Is your vacuum cleaner s
More informationNational 4 Physics - Electricity and Energy Summary Notes
Electromagnetism Magnetic fields Magnetic fields are found around any permanent or electromagnet. They are normally invisible but can be shown up by placing a sheet of paper over the magnet and sprinkling
More informationElectrical Energy and Power Ratings
Section 1 - From the Wall Socket Electrical Energy and ower Ratings Batteries and the mains are sources of electrical energy. Electrical appliances can then convert this into other forms of energy. e.g.
More information