ELECTRICAL Quantities

Size: px
Start display at page:

Transcription

1 1 ELECTRICAL Quantities Friction And Charge When two materials rub together the contact between their surfaces may cause: a) the surfaces to become hot and show wear and tear. b) the surfaces to become attracted to other materials. (e.g. When we rub a plastic comb with a fabric it can attract small pieces of paper. In this example we can say that the plastic comb was electrified or charged by the rubbing and this process is called charging. Either adding electrons or removing electrons from an object can charge it. Adding electrons to an object causes the object to be negatively charged. Removing electrons from an object causes the object to be positively charged. We can use simple experiments involving cellulose acetate rods and polythene rods to demonstrate that there are only two kinds of electric charge and that they are opposite because they have the ability to neutralise each other. Polythene Rod and Cellulose Acetate Rod When we rub the polythene rod with a cloth, it gains electrons from the cloth and becomes negatively charged. This leaves a deficiency in the cloth and hence it becomes positively charged. When we rub a cellulose acetate rod with a cloth, it loses electrons to the cloth and becomes positively charged. This causes an excess of electrons in the cloth, which makes it negatively charged.

2 2 Attraction and Repulsion If we place two charged cellulose acetate rods together, they will repel each other. This situation also occurs if two charged polythene rods are used. However, if we place a charged cellulose acetate rod and a charged polythene rod next to each other they would attract to each other. We can therefore conclude that like charges always repel each other and unlike charges always attract each other. Read and make notes (also include diagrams) on: PFC Page 196 Page 201 charged and neutral objects where charge come from how do objects become charge? charging by induction separating conductors earthing a conductor

3 3 Phenomena and Hazards Associated With Electrostatic Charging Overcoats worn by jumpers become charged as persons move around in it Collection of dust on television sets is caused by electrostatic charging Aircraft flying through the atmosphere Fuel tankers become charged as they travel. Tankers use metal chains to discharge static electricity Lightning fork occurs between clouds and ground, sheet occurs between clouds Research and make notes on (explanations and diagrams): Uses of Electrostatics Crop Spraying Spray Painting Dust Collectors

4 4 Electric Currents Charges that produce repulsion and attraction between objects can also produce an electric current if the charge can flow through it. An electric current is actually the flow of electric charge moving a particular direction. To maintain an electric current, the charge needs a continuous path to travel around (closed circuit) Definitions Current (I) Units: Amperes (A) A current of one (1) ampere is the flow of charge at a rate of one (1) coulomb per second. Current is the force between the current carrying conductors. We can use the ammeter to measure the current. One of the formulas we can use to measure the current is: current = charge time Q I = Q t I t Charge (Q) Units: Coulombs (C) A Coulomb is the quantity of electric charge, which passes a point in the conductor at a steady current of one (1) ampere for one (1) second. charge = current time Q = I t Potential The potential at a point in an electric circuit is defined as the work done to bring one (1) unit positive charge from infinity to that point. Potential Difference (p.d.) Units: Volts (V) The potential difference between two points is the work done per coulomb when electrical energy is converted to another form of energy when current flows through a circuit. potential difference = energy charge W V = W Q V Q

5 5 Electromotive Force (e.m.f.) Units: Volts (V) An electromotive force is the work done per coulomb when another form of energy is converted to electrical energy at a cell or generator. The e.m.f. is the total amount of energy a cell or a generator can produce and it is the sum of all the p.d. inserted. Both the electromotive force and the potential difference can be measured by using the voltmeter. Volt The potential difference between two points in an electrical circuit is one (1) volt if 1 J of work is done to move 1 C of charge between two points. N.B. one (1) volt = one (1) joule / coulomb [1 J/C] Examples 1. A battery circulates a charge around a circuit of two (2) minutes. If the current in the circuit is five (5) amperes, what quantity of charge passes through the battery? 2. A charge of 170 coulombs goes through a lamp every five minutes. Calculate the electric current. 3. A current of 40 amps flows through a heater for three (3) hours converts joules of electrical energy into heat energy. Calculate: (a) the total charge flowing through the heater. (b) p.d. across the heater. 4. A battery circulates 180 C of charge around a circuit. If the p.d. across a lamp in the circuit is 22 volts. How much energy is converted into heat and the light by the lamp? If the charge flows at a constant rate for 75 seconds, what is the current during this time?

6 6 Resistance The ratio of the potential difference across a conductor compared to the current flowing through it Ohm s Law Ohm s law states that the current through a conductor at a constant temperature is directly proportional to the potential difference between its ends. I α V V = constant I where the constant the is the resistance of the conductor R = V I V or V = IR I R Ohm The resistance of a conductor is 1Ω if a current of 1A exists in the conductor when the potential difference of 1V is placed across it.. Examples a) A current of 9A flows through a headlamp when it is connected to a car battery providing that a voltage of 14 V flows across the headlamp. Calculate the resistance of the headlamp. b) What is the current passing through a torchlight lamp of resistance 35 Ω, given that the potential difference is 7 V? c) What is the potential difference required to produce a current of 5.5A through a conductor of resistance 8 Ω?

7 7 Power When the energy is converted from one form to another the rate of conversion is defined as power. Units of power: watts (W) They are three basic formulas we can use calculate the power of an electrical circuit. 1. P = IV P I V 2. P = I 2 R P I 2 R 3. P = V 2 V 2 R P R (NB: Need to derive the power formulae listed above) Examples a) An electric wire has a power rating of 5 kw. Calculate the current that will flow through the fire when it is connected to the 210 V mains supply. b) A torch bulb is labelled 4.5 V, 0.8 A. Calculate the power of the bulb and the energy converted in 10 minutes. c) An electric kettle has a heating element rated 2 kw when connected to a 550 V electrical supply. Calculate: (i) the current that would flow when the element was connected to the 550 V supply. (ii) (iii) the resistance of the element. The heat produced by the element in one (1) minute.

8 8 Resistivity Units: ohm meter (Ωm) Resistivity is the unique resistance times the length of a particular substance and the values can vary from Ωm for silver to 2300 Ωm for silicon The resistivity (ρ) of a material is the numerical value equal to the resistance (R) of the material 1m long with a cross section of 1 m 2. R = ρl A The resistance of a substance depends on the nature of the substance depends on the nature of the substance and the physical dimensions. The resistance of a conductor depends on: The thickness of the conductor. (i.e. the resistance of the conductor is inversely proportional to is cross sectional area.) R α 1 A The resistance of the conductor. The resistance of a conductor is directly proportional to the length. R α L The resistance depends on the material that makes up the conductor. Example An electric hot plate has a coil of length 20m and a cross sectional area of 0.23 mm 2. A potential difference of 120V is placed across it. The resistivity of the wire material is Ωm. Calculate: (i) (ii) (iii) (iv) the resistance of the wire the current through the coil the charge which passes through it in half an hour the power produced in the coil. Conductance (G) The electrical conductance of a conductor is the reciprocal of its resistance G = 1 R where G = electrical conductance (Siemens (S) = Ω -1 ) R = electrical resistance (Ω)

9 9 Conductivity (σ) The electrical conductivity of a material is the reciprocal of its resistivity σ = 1 ρ where σ = electrical conductivity (Sm -1 = Ω -1 m -1 ) ρ = electrical resistivity (Ωm) Current Density (J) The current density at a point in a conductor is defined as the current per unit crosssectional area at that point J = I A where J = current density (Am -2 ) I = current (A) A = cross-sectional area (m 2 ) Read and make Notes on the Mechanism of Conduction in Metals. Muncaster Page 538, 36.2 Drift Velocity Drift velocity is defined as the average velocity that electrons (ions) flow in a given conductor of circuit. For a circuit the direction of this drift velocity points from negative to positive of the battery and this resultant drift of charge constitutes an electric current.

10 10 Deriving Drift Velocity (I = nave and J = nve) Consider a conductor of length, L and cross sectional area, A, having n free electrons per unit volume each carrying a charge, e. A v L The volume of the section of a conductor can be calculated using volume = L A The number of electrons in this volume can be calculated = nla The total amount of charge which is free to move = (nla)e We can calculate the time it takes by using the formula time = length (L) velocity (v) Hence the rate of flow of charge (or current) pass a point X is = charge time = (nlae) L v I = nave Also since J = I A We can conclude that J = nve

11 11 Temperature Coefficient of Resistance (α) The temperature coefficient of resistance, α, is defined by α = increase in resistance per Resistance at 0 Hence the average value of α between two temperatures θ1 and θ2 is given by α = R θ 2 R θ1 R 0 (θ 2 θ 1 ) where R θ2 resistance of specimen atθ2, R0 resistance of specimen at 0 o C R θ1 resistance of specimen atθ1 Classwork: Muncaster Page 538 Questions 36 A # 1-4

ELECTROSTATICS. When two materials rub together the contact between their surfaces may cause: a) the surfaces to become hot and show wear and tear.

1 ELECTROSTATICS Friction And Charge When two materials rub together the contact between their surfaces may cause: a) the surfaces to become hot and show wear and tear. b) the surfaces to become attracted

TOPIC 4 STATIC ELECTRICITY

IGCSE Physics 0625 notes Topic 4: Static Electricity 1 TOPIC 4 STATIC ELECTRICITY ELECTRICITY: Electricity is the flow of electrical charges or power. The charges could be in the form of electrons or ions.

CLASS X- ELECTRICITY

Conductor- Insulator: Materia Materials through which electric current cannot pass are called insulators. Electric Circuit: A continuous a CLASS X- ELECTRICITY als through which electric current can pass

Electric Charge. Electric Charge ( q ) unbalanced charges positive and negative charges. n Units Coulombs (C)

Electric Charge Electric Charge ( q ) unbalanced charges positive and negative charges n Units Coulombs (C) Electric Charge How do objects become charged? Types of materials Conductors materials in which

Electricity Worksheet (p.1) All questions should be answered on your own paper.

Electricity Worksheet (p.1) 1. In terms of attraction and repulsion, how do negative particles affect negative particles? How do negatives affect positives? 2. What happens to electrons in any charging

Electron Theory of Charge. Electricity. 1. Matter is made of atoms. Refers to the generation of or the possession of electric charge.

Electricity Refers to the generation of or the possession of electric charge. There are two kinds of electricity: 1. Static Electricity the electric charges are "still" or static 2. Current Electricity

5. ELECTRIC CURRENTS

5. ELECTRIC CURRENTS TOPIC OUTLINE Section Recommended Time Giancoli Section 5.1 Potential Difference, Current, Resistance 5.2 Electric Circuits 3h 19.1, 19.2 6.2 Electric Field and Force 6.3 Magnetic

8. Electric circuit: The closed path along which electric current flows is called an electric circuit.

GIST OF THE LESSON 1. Positive and negative charges: The charge acquired by a glass rod when rubbed with silk is called positive charge and the charge acquired by an ebonite rod when rubbed with wool is

Name: Class: Date: 1. Friction can result in the transfer of protons from one object to another as the objects rub against each other.

Class: Date: Physics Test Review Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. 1. Friction can result in

SNC1DI Unit Review: Static & Current Electricity

SNC1DI Unit Review: Static & Current Electricity 1. Be able to recognize the definitions for the following terms: Friction Contact Induction Lightning Electrostatic Series Pithball electroscope Insulators

Electromagnetism Checklist

Electromagnetism Checklist Elementary Charge and Conservation of Charge 4.1.1A Convert from elementary charge to charge in coulombs What is the charge in coulombs on an object with an elementary charge

STUDY GUIDE CHAPTER 5 ELECTRICITY AND MAGNETISM 1) ASSOCIATE ELEMENTARY PARTICLES WITH THEIR ELECTRICAL CHARGE

Name Date STUDY GUIDE CHAPTER 5 ELECTRICITY AND MAGNETISM 1) ASSOCIATE ELEMENTARY PARTICLES WITH THEIR ELECTRICAL CHARGE Scientists now know that an atom is composed of even smaller particles of matter:

Test Review Electricity

Name: Date: 1. An operating television set draws 0.71 ampere of current when connected to a 120-volt outlet. Calculate the time it takes the television to consume 3.0 10 5 joules of electric energy. [Show

Physics Module Form 5 Chapter 2- Electricity GCKL 2011 CHARGE AND ELECTRIC CURRENT

2.1 CHARGE AND ELECTRIC CURRENT Van de Graaf 1. What is a Van de Graaff generator? Fill in each of the boxes the name of the part shown. A device that produces and store electric charges at high voltage

ELECTRICITY. Electric Circuit. What do you already know about it? Do Smarty Demo 5/30/2010. Electric Current. Voltage? Resistance? Current?

ELECTRICITY What do you already know about it? Voltage? Resistance? Current? Do Smarty Demo 1 Electric Circuit A path over which electrons travel, out through the negative terminal, through the conductor,

CHAPTER 12 ELECTRICITY Electricity is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena such

PHYSICS FORM 5 ELECTRICAL QUANTITES

QUANTITY SYMBOL UNIT SYMBOL Current I Amperes A Voltage (P.D.) V Volts V Resistance R Ohm Ω Charge (electric) Q Coulomb C Power P Watt W Energy E Joule J Time T seconds s Quantity of a Charge, Q Q = It

Electrical equations calculations

Task Use the following equations to answer the questions. You may need to rearrange the equations and convert the units. An example has been done for you. P = I x V V = I x R P = I 2 x R E = P x t E =

Section 1 Electric Charge and Force

CHAPTER OUTLINE Section 1 Electric Charge and Force Key Idea questions > What are the different kinds of electric charge? > How do materials become charged when rubbed together? > What force is responsible

Forces Read Chapter 7; pages: 191-221 Objectives: - Describe how electrical charges exert forces on each other; Compare the strengths of electric and gravitational forces; Distinguish between conductors

Unit 3 BLM Answers UNIT 3 BLM 3-46

UNIT 3 BLM 3-46 Unit 3 BLM Answers BLM 3-3, Charge Transfer Diagrams 1. Positively charged objects should have more (+) than ( ). Negatively charged objects should have more ( ) than (+). 2. They must

Electric charges. Basics of Electricity

Electric charges Basics of Electricity Electron has a negative charge Neutron has a no charge Proton has a positive charge But what is a charge? Electric charge, like mass, is a fundamental property of

Electrical Forces arise from particles in atoms.

Electrostatics Electrical Forces arise from particles in atoms. The protons(+) in the nucleus attract the electrons and hold them in orbit Electrons(-)repel other electrons and protons repel other protons

(b) State the relation between work, charge and potential difference for an electric circuit.

Question Bank on Ch-Electricity 1. (a) Define the S.I unit of potential difference. (b) State the relation between work, charge and potential difference for an electric circuit. Calculate the potential

Electrostatics and Charge. Creating Electric Fields

Electrostatics and Charge Creating Electric Fields Electric Charges Recall that all matter is made of atoms. Neutral atoms can acquire a charge in several different ways, all of which require movement

Electricity 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

What is electricity? Charges that could be either positive or negative and that they could be transferred from one object to another.

Electricity What is electricity? Charges that could be either positive or negative and that they could be transferred from one object to another. What is electrical charge Protons carry positive charges

Electricity. Part 1: Static Electricity

Electricity Part 1: Static Electricity Introduction: Atoms Atoms are made up of charged particles. Atoms are made of 3 subatomic particles: Electrons protons, electrons and neutrons. Protons () Charge

A Review of Circuitry

1 A Review of Circuitry There is an attractive force between a positive and a negative charge. In order to separate these charges, a force at least equal to the attractive force must be applied to one

[This is Unit 2 Physics, Additional Physics. This section comes after Core Physics in an AQA Course (Unit 1)]

Contents Unit 1: Motion Unit 2: Speeding Up and Slowing Down Unit 3: Work and Energy Unit 4: Static Electricity Unit 5: Current Electricity Unit 6: Mains Electricity Unit 7: Nuclear Physics [This is Unit

PSC1341 Chapter 5 Electricity and Magnetism

PSC1341 Chapter 5 Electricity and Magnetism Chapter 5: Electricity and Magnetism A. The Atom B. Electricity C. Static Electricity D. A circuit E. Current and Voltage F. Resistance G. Ohm s Law H. Power

ELECTRICITY 1.1 INTRODUCTION

1 ELECTRICITY 1.1 INTRODUCTION Electricity is one of the most important sources of energy in the modern world. All appliances such as lights, fans, torch, geysers, air-conditioners, televisions, computers,

Revision checklist SP10. SP10 Electricity and Circuits. SP10a Electric circuits. SP10b Current and potential difference

Electricity and Circuits a Electric circuits Describe the basic structure of an atom (positions, relative masses and relative charges of protons, neutrons and electrons). Recognise the circuit symbols

Lesson Plan: Electric Circuits (~130 minutes) Concepts

Lesson Plan: Electric Circuits (~130 minutes) Concepts 1. Electricity is the flow of electric charge (electrons). 2. Electric Charge is a property of subatomic particles. 3. Current is the movement of

earth live neutral (ii) What is the colour of the insulation around the wire labelled T? blue brown green and yellow

Q. (a) The diagram shows the inside of a three-pin plug. What name is given to the wire labelled S? Draw a ring around the correct answer. earth live neutral () What is the colour of the insulation around

Electric charge is conserved the arithmetic sum of the total charge cannot change in any interaction.

Electrostatics Electric charge is conserved the arithmetic sum of the total charge cannot change in any interaction. Electric Charge in the Atom Atom: Nucleus (small, massive, positive charge) Electron

2015 EdExcel A-Level Physics Topic 3. Charge and current

2015 EdExcel A-Level Physics Topic 3 Charge and current 9/17/2018 Electric Charge Atoms consists of Negatively-charged electrons and Positively charged protons. Atoms have the same number of protons and

CHARGE AND ELECTRIC CURRENT:

ELECTRICITY: CHARGE AND ELECTRIC CURRENT ELECTRIC CHARGE ELECTRIC CURRENT ELECTRIC CIRCUIT DEFINITION AND COMPONENTS EFFECTS OF ELECTRIC CURRENT TYPES OF CIRCUITS ELECTRIC QUANTITIES VOLTAGE CURRENT RESISTANCE

Insulators Non-metals are very good insulators; their electrons are very tightly bonded and cannot move.

SESSION 11: ELECTRIC CIRCUITS Key Concepts Resistance and Ohm s laws Ohmic and non-ohmic conductors Series and parallel connection Energy in an electric circuit X-planation 1. CONDUCTORS AND INSULATORS

Chapter 3: Electric Current And Direct-Current Circuits

Chapter 3: Electric Current And Direct-Current Circuits 3.1 Electric Conduction 3.1.1 Describe the microscopic model of current Mechanism of Electric Conduction in Metals Before applying electric field

Physics Module Form 5 Chapter 2- Electricity GCKL 2011 CHARGE AND ELECTRIC CURRENT

2.1 CHARGE AND ELECTRIC CURRENT Van de Graaf 1. What is a Van de Graaff generator? Fill in each of the boxes the name of the part shown. A device that... and... at high voltage on its dome. dome 2. You

Electricity Review completed.notebook. June 13, 2013

Which particle in an atom has no electric charge associated with it? a. proton c. neutron b. electron d. nucleus Jun 12 9:28 PM The electrons in a metal sphere can be made to move by touching it with a

Electric Charges & Current. Chapter 12. Types of electric charge

Electric Charges & Current Chapter 12 Types of electric charge Protons w/ + charge stuck in the nucleus Electrons w/ - charge freely moving around the nucleus in orbits 1 Conductors Allow the easy flow

Preliminary Course Physics Module 8.3 Electrical Energy in the Home Summative Test. Student Name:

Summative Test Student Name: Date: / / IMPORTANT FORMULAE I = Q/t V = I.R R S = R 1 + R 2 +.. 1/R P = 1/R 1 + 1/R 2 + P = V.I = I 2.R = V 2 /R Energy = V.I.t E = F/q Part A. Multiple Choice Questions 1-20.

7.1 ANALYSING ELECTRIC FIELDS AND CHARGE FLOW

7.1 ANALYSING ELECTRIC FIELDS AND CHARGE FLOW State the relationship between electron and electric current Where does charge come from? Matter is made up of tiny particles called atoms. At the center of

G E F D. 1. The diagram shows an electronic circuit. Write down the names of the components in the list below. A =... B =... C =... D =...

1. The diagram shows an electronic circuit. + 9 V G E A F D B C 0 V (a) Write down the names of the components in the list below. A =... B =... C =... D =... E, F and G =... (5) watford grammar school

PhysicsAndMathsTutor.com

Electricity May 02 1. The graphs show the variation with potential difference V of the current I for three circuit elements. PhysicsAndMathsTutor.com When the four lamps are connected as shown in diagram

Section 1: Electric Charge and Force

Electricity Section 1 Section 1: Electric Charge and Force Preview Key Ideas Bellringer Electric Charge Transfer of Electric Charge Induced Charges Charging by Contact Electric Force Electric Field Lines

Electricity Courseware Instructions

Physics Electricity Courseware Instructions This courseware acts as a supplement to the classroom instruction. The five sections on the following slide link to the topic areas. Following the topic area

Electricity

Electricity Electric Charge There are two fundamental charges in the universe. Positive (proton) has a charge of +1.60 x 10-19 C Negative (electron) has a charge of 1.60 x 10-19 C There is one general

uncharged and charged objects Electrostatic induction

35 Static electricity Electrons, insulators and conductors In an insulator all electrons are bound firmly to their atoms; in a conductor some electrons can move freely from atom to atom. An insulator can

Questions Q1. A battery sends a current through a metal wire. ) in the box next to your answer. (a) (i) Complete the sentence by putting a cross (

Questions Q1. A battery sends a current through a metal wire. (a) (i) Complete the sentence by putting a cross ( ) in the box next to your answer. Direct current is movement of charge (1) A backwards and

Review. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.

Review Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. When more devices are added to a series circuit, the total circuit resistance: a.

Theme 5: Electricity in the Home

Theme 5: Electricity in the Home Static Electricity WHAT IS STATIC ELECTRICITY? Everything we see is made up of tiny little parts called atoms. So what are atoms made of? In the middle of each atom is

Electricity. Prepared by Juan Blázquez, Alissa Gildemann. Electric charge is a property of all objects. It is responsible for electrical phenomena.

Unit 11 Electricity 1. Electric charge Electric charge is a property of all objects. It is responsible for electrical phenomena. Electrical phenomena are caused by the forces of attraction and repulsion.

Electricity and Electromagnetism SOL review Scan for a brief video. A. Law of electric charges.

A. Law of electric charges. Electricity and Electromagnetism SOL review Scan for a brief video The law of electric charges states that like charges repel and opposite charges attract. Because protons and

https://www.youtube.com/watch?v=yc2-363miqs SCIENCE 9 UNIT 3 ELECTRICITY Remember: In the last unit we learned that all matter is made up of atoms atoms have subatomic particles called, protons, neutrons

AP Physics C - E & M

Slide 1 / 27 Slide 2 / 27 AP Physics C - E & M Current, Resistance & Electromotive Force 2015-12-05 www.njctl.org Slide 3 / 27 Electric Current Electric Current is defined as the movement of charge from

ELECTRICITY. Chapter ELECTRIC CHARGE & FORCE

ELECTRICITY Chapter 17 17.1 ELECTRIC CHARGE & FORCE Essential Questions: What are the different kinds of electric charge? How do materials become charged when rubbed together? What force is responsible

Nama :.. Kelas/No Absen :

Nama :.. Kelas/No Absen : TASK 2 : CURRENT AND RESISTANCE 1. A car battery is rated at 80 A h. An ampere-hour is a unit of: A. power B. energy C. current D. charge E. force 2. Current has units: A. kilowatt-hour

Algebra Based Physics

Page 1 of 105 Algebra Based Physics Electric Current & DC Circuits 2015-10-06 www.njctl.org Page 2 of 105 Electric Current & DC Circuits Circuits Conductors Resistivity and Resistance Circuit Diagrams

GRADE 11F: Physics 4 Current electricity UNIT 11FP.4 10 hours About this unit This unit is the fourth of five units on physics for Grade 11 foundation. The unit is designed to guide your planning and teaching

Electric Current. Chapter 17. Electric Current, cont QUICK QUIZ Current and Resistance. Sections: 1, 3, 4, 6, 7, 9

Electric Current Chapter 17 Current and Resistance Sections: 1, 3, 4, 6, 7, 9 Whenever electric charges of like signs move, an electric current is said to exist The current is the rate at which the charge

Electromagnetism Review Sheet

Electromagnetism Review Sheet Electricity Atomic basics: Particle name Charge location protons electrons neutrons + in the nucleus - outside of the nucleus neutral in the nucleus What would happen if two

EXPERIMENT 12 OHM S LAW

EXPERIMENT 12 OHM S LAW INTRODUCTION: We will study electricity as a flow of electric charge, sometimes making analogies to the flow of water through a pipe. In order for electric charge to flow a complete

Electric Current & DC Circuits

Electric Current & DC Circuits Circuits Click on the topic to go to that section Conductors Resistivity and Resistance Circuit Diagrams Measurement EMF & Terminal Voltage Kirchhoff's Rules Capacitors*

Chapter 19, Electricity Physical Science, McDougal-Littell, 2008

SECTION 1 (PP. 633-641): MATERIALS CAN BECOME ELECTRICALLY CHARGED. Georgia Standards: S8P2c Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and

Electricity. dronstudy.com

Electricity Electricity is a basic part of our nature and it is one of our most widely used forms of energy. We use electricity virtually every minute of every day for example in lighting, heating, refrigeration,

Part 4: Electricity & Magnetism

Part 4: Electricity & Magnetism Notes: Magnetism Magnetism Magnets: 1.Have a north and south pole 2.Like poles repel; opposite poles attract - The larger the distance between the magnets, the weaker the

Magnets attract some metals but not others

Electricity and Magnetism Junior Science Magnets attract some metals but not others Some objects attract iron and steel. They are called magnets. Magnetic materials have the ability to attract some materials

Electricity. Chapter 21

Electricity Chapter 21 Electricity Charge of proton Positive Charge of electron Negative Charge of neutron NONE Atoms have no charge because the charges of the protons and electrons cancel each other out.

Name: Block: Date: NNHS Introductory Physics: MCAS Review Packet #4 Introductory Physics, High School Learning Standards for a Full First-Year Course

Introductory Physics, High School Learning Standards for a Full First-Year Course I. C ONTENT S TANDARDS electricity and magnetism. 5.1 Recognize that an electric charge tends to be static on insulators

Electricity & Magnetism

Electricity & Magnetism Unit 7 Recall that Atoms l Have neutrons, protons, and electrons. l Protons are positively charged l Electrons are negatively charged l Opposite charges attract l Same charges repel

Electricity & Magnetism. Unit 6

Electricity & Magnetism Unit 6 Recall that Atoms l Have neutrons, protons, and electrons. l Protons are positively charged l Electrons are negatively charged l Opposite charges attract l Same charges repel

Chapter 17. Current and Resistance. Sections: 1, 3, 4, 6, 7, 9

Chapter 17 Current and Resistance Sections: 1, 3, 4, 6, 7, 9 Equations: 2 2 1 e r q q F = k 2 e o r Q k q F E = = I R V = A L R ρ = )] ( 1 [ o o T T + = α ρ ρ V I V t Q P = = R V R I P 2 2 ) ( = = C Q

1.3 Most domestic appliances are connected to the mains electricity with a plug. Explain why a plug needs a live and a neutral wire.

4-2 Electricity Physics.0 Most domestic appliances are connected to the mains electricity.. What is the frequency of mains electricity? Tick one box [ mark].05 A 50 Hz 230 V.2 What is the potential difference

52 VOLTAGE, CURRENT, RESISTANCE, AND POWER

52 VOLTAGE, CURRENT, RESISTANCE, AND POWER 1. What is voltage, and what are its units? 2. What are some other possible terms for voltage? 3. Batteries create a potential difference. The potential/voltage

1. What is heating effect of current? What is its cause?

GRADE: X PHYSICS (ELECTRICITY) DOMESTIC ELECTRIC CIRCUITS: SERIES OR PARALLEL Disadvantages of series circuits for domestic wiring : In series circuit, if one electrical appliance stops working, due to

Electricity. Year 10 Science

Electricity Year 10 Science What is electricity? The collection or flow of electrons in the form of an electric charge What is static electricity? A stationary electrical charge that is built up on the

What colour is the insulation around the wire connected to the live pin inside the plug? ... (1) (1)

Q. Diagram shows a hairdryer. Diagram 2 shows how the heaters and fan of the hairdryer are connected to a 3-pin plug. The hairdryer does not have an earth wire. (a) What colour is the insulation around

Module 1 Units 3,4,5

Module 1 Units 3,4,5 1. What is matter? Anything that occupies space or has mass 2. What are the two general categories of substances? Elements and compounds 3. How many naturally occurring elements are

Material World Electricity and Magnetism

Material World Electricity and Magnetism Electrical Charge An atom is composed of small particles of matter: protons, neutrons and electrons. The table below describes the charge and distribution of these

Chapter 26 & 27. Electric Current and Direct- Current Circuits

Chapter 26 & 27 Electric Current and Direct- Current Circuits Electric Current and Direct- Current Circuits Current and Motion of Charges Resistance and Ohm s Law Energy in Electric Circuits Combination

4.2.1 Current, potential difference and resistance

4.2 Electricity Electric charge is a fundamental property of matter everywhere. Understanding the difference in the microstructure of conductors, semiconductors and insulators makes it possible to design

12/2/2018. Monday 12/17. Electric Charge and Electric Field

Electricity Test Monday 1/17 Electric Charge and Electric Field 1 In nature, atoms are normally found with equal numbers of protons and electrons, so they are electrically neutral. By adding or removing

Dynamic Electricity. All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison

Dynamic Electricity All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison Review Everything is made of atoms which contain POSITIVE particles called PROTONS and NEGATIVE

Static Electricity. Electric Field. the net accumulation of electric charges on an object

Static Electricity the net accumulation of electric charges on an object Electric Field force exerted by an e - on anything that has an electric charge opposite charges attract like charges repel Static

NATIONAL 5 PHYSICS ELECTRICITY

NATIONAL 5 PHYSICS ELECTRICITY ELECTRICAL CHARGE CARRIERS AND CURRENT Electrical Charge Electrical charge exists in two distinct types positive charge and negative charge. It is also possible for an object

Chapter 3 Static and Current Electricity

Chapter 3 Static and Current Electricity 3.1 Static Electricity - the build up of an electronic charge on a body (object) Electroscope - a device for detecting (not measuring) static charge attraction/repulsion

Electrostatics is the study of non-moving electric charges, sometimes called static electricity.

Electrostatic Phenomena Electrostatics is the study of non-moving electric charges, sometimes called static electricity. A simple experiment will demonstrate the phenomena. 1. Take a polythene rod and

Handout 5: Current and resistance. Electric current and current density

1 Handout 5: Current and resistance Electric current and current density Figure 1 shows a flow of positive charge. Electric current is caused by the flow of electric charge and is defined to be equal to

CHAPTER 1 ELECTRICITY

CHAPTER 1 ELECTRICITY Electric Current: The amount of charge flowing through a particular area in unit time. In other words, it is the rate of flow of electric charges. Electric Circuit: Electric circuit

Question 3: How is the electric potential difference between the two points defined? State its S.I. unit.

EXERCISE (8 A) Question : Define the term current and state its S.I unit. Solution : Current is defined as the rate of flow of charge. I = Q/t Its S.I. unit is Ampere. Question 2: Define the term electric

LESSON 5: ELECTRICITY II

LESSON 5: ELECTRICITY II The first two points are a review of the previous lesson 1.1.ELECTRIC CHARGE - Electric charge is a property of all objects and is responsible for electrical phenomena. -All matter

Electron Theory. Elements of an Atom

Electron Theory Elements of an Atom All matter is composed of molecules which are made up of a combination of atoms. Atoms have a nucleus with electrons orbiting around it. The nucleus is composed of protons

Revision Compare Between. Application

evision Compare etween Points of Comparison Series Connection Parallel Connection Drawing otal resistance ( ) = + + 3 3 Potential Difference () = + + 3 = = = 3 Electric Current (I) I = I = I = I 3 I =

SECTION 3 BASIC AUTOMATIC CONTROLS UNIT 12 BASIC ELECTRICITY AND MAGNETISM

SECTION 3 BASIC AUTOMATIC CONTROLS UNIT 12 BASIC ELECTRICITY AND MAGNETISM Unit Objectives Describe the structure of an atom. Identify atoms with a positive charge and atoms with a negative charge. Explain