Electricity Courseware Instructions


 Hester Davidson
 5 years ago
 Views:
Transcription
1 Physics
2 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 tutorials are topic area questions. Each question slide is followed by a solution slide. Selected problems include explanations. The end of each section includes a return home. At any home icon, you may return to the Table of Contents.
3 Charges Current Voltage Resistance Circuits
4
5 STATIC ELECTRICITY
6 What is Electrostatics The study of charges at rest and their electric fields and potentials
7 Structure of the atom The nucleus contains protons and neutrons. Electrons exist in a cloud around the nucleus Protons have a (+) charge. Neutrons have a (o) charge Electrons have a () charge
8 The Coulomb The Coulomb is the SI unit for charge. One coulomb = x 10 elementary charges Elementary charges ( e ) are protons or electrons
9 The Elementary Charge (e) The elementary charge is equal to the magnitude of charge on a proton or electron. Charge is measured in Coulombs.
10 The Elementary Charge (e) The charge on a single electron is (  e ) x 10 coulombs The charge on a single proton is ( + e ) x 10 coulombs
11 The net charge on an object must be a multiple of (e) Example: A charge of x 10 C is possible. This is a charge of (+5e)  19 A charge of x 10 C is not possible. This would be a charge of (+( + 3/2 e) 19
12 Mass of electrons and protons Although the magnitude of the charge for protons and electrons is the same their masses are very different. The mass of a proton is x 10 kg. The mass of an electron is x 10 kg.
13 Charged Objects Objects with the same charge will repel each other. Objects with different charges will attract each other. Objects with a positive or negative charge can attract neutral objects.
14 Law of Conservation of Charge In a closed isolated system the total charge on the system remains constant. Electrons are the moving charge between objects. Protons are much less likely to be transferred. Electrons can be transferred from one object in the system to another but the total charge of the system remains the same.
15 Example of Transfer of Charge A system contains 3 charged spheres. The first sphere has a charge of (+ 10 e) The second has a charge of (( 6 e) The third has a charge of (16( e) e 6 e 16 e
16 Question Spheres 1 & 2 are allowed to touch and are then separated. What will be the charge on each sphere? e 6 e 16 e
17 Solution The total charge on spheres 1 & 2 is (+ 10 e ) + (  6 e ) = ( + 4 e ) e 6 e 16 e
18 Solution The total charge on spheres 1 & 2 is (+ 10 e ) + (  6 e ) = ( + 4 e ) + 4e 16 e
19 Solution When the spheres are separated the charge will be equally shared. (+ 2 e ) + ( + 2 e ) = ( + 4 e ) The total charge is conserved. + 2 e + 2 e 16 e
20 Question All three spheres are now allowed to touch. They are then separated. What will be the charge on each sphere? e + 2 e 16 e
21 Solution The total charge on all three spheres is ( + 2 e ) + ( + 2 e ) + (  16 e ) = (  12 e ) e + 2 e 16 e
22 Solution The total charge on all three spheres is ( + 2 e ) + ( + 2 e ) + (  16 e ) = (  12 e ) e
23 Solution When the spheres are separated the charge is distributed evenly. The total charge is conserved (  4 e ) + (  4 e ) + (  4 e ) = (  12 e ) e 4 e 4 e
24 COULOMB S S LAW The magnitude of the electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. k q1q2 Fe = 2 r
25 COULOMB S S LAW k q1q2 Fe = 2 r k = 8.99 x 10 N m / C
26 Question What is the electrostatic force between two charged spheres separated by a distance of 3 cm. 12 q1 = 3.2 x 10 C  11 q2 = 4.5 x 10 C r = 3 cm.
27 Solution x 10 N m / C ( 3.2 x 10 )( 4.5 x 10 ) Fe = 2 (.03 m ) Answer = 1.44 x 10 N 9
28 Return Home Or Go to Questions
29 Charges Questions
30
31 (3) x 10 C
32
33 The sign of the charge on a proton is ( + ) The sign of the charge on an electron is (  ) The magnitude of the charge on each is equal x 10 C
34
35 ( 3 )
36
37 ( 3 )
38
39 ( 3 )
40
41 ( 2 ) + 4 uc The total charge on all three is + 12 uc The charge is shared equally between the 3 spheres.
42
43 ( 4 )
44
45 ( 1 )
46
47 x 10 N m / C ( 3.0 x 10 C ) ( 4.0 x 10 C ) Fg =  2 ( 2.0 x 10 m ) Fg = 2.7 N
48 Return Home Or Advance to Next Section
49
50 Electric Current Electric current is the rate at which charge passes a given point in an electric circuit. An electric circuit is a closed loop through which charged particles move. One condition for an electric current to exist is a complete closed loop for electrons to flow. The electrons begin from a source and return to their point of origin. Unit of current is an ampere. ( I )
51 Electric Current Open circuit + Voltage source switch open
52 complete circuit Electric Current 12 V switch closed current flows
53 Symbols for a Battery and a Resistor + _ symbol for a battery ( voltage source ) symbol for a resistor ( ohms )
54 Electric Circuit A simple electric circuit. A circuit requires a closed loop, a resistance, and a potential difference (Voltage source ). + I 12 V 3 ohms _ resistor
55 Amperes ( I ) Unit of current is an ampere. ( I ) The following equation is used to determine current. q is the amount of charge in coulombs. t is the time in seconds. I = t q
56 Problem 2 A charge of 5.8 x 10 C passes through a wire in 2 minutes. What is the current? q = 5.8 x 10 C t = 2 minutes What is the current (I)? 2
57 Answer 2 I = 5.8 x 10 C 120 seconds = 4.83 amps
58 Amperes Another useful relationship for current is expressed in terms of voltage and resistance. I = V R
59 Amperes In the following circuit the current ( I ) is 12 V I = = 4 amps 3 ohms + 12 V I 3 _ resistor
60 Amperes What is the current ( I ) in the following circuit? + 40 V I 8 _ resistor
61 What is the current ( I ) in the following circuit? 40 V I = = 5 amps 8 ohms + 40 V I = 5 A 8 _ resistor
62 Ammeters An ammeter is a device used to measure current. The ammeter allows the entire current to flow through it. This is because the ammeter offers only a very small resistance to the current. Ammeters are connected in series with the other elements in a circuit.
63 Ammeters The ammeter allows the entire current to flow through it. + A 12 V 4 amps 3 ohms The ammeter (A) measures 4 amps
64 Voltmeters A voltmeter measure voltage. A voltmeter does not allow the current to pass through it. This is because a voltmeter has a very high resistance to current flow. Voltmeters are connected in parallel with the resistor across which a potential difference is being measured.
65 Voltmeters The voltmeter does not allow the current to flow through it. The current flows through the resistor. A 12 V V The voltmeter ( V ) measures 12 Volts
66 Return Home Or Go to Questions
67
68 1 Amp = 1 Coulomb/sec coulomb = 6.25 x 10 e 2 Amps = 2 coulombs/sec Answer: ( 3 ) 2 ( 6.25 x 10 e ) = 1.25 x 10 e
69
70 ( 3 )
71 Return Home Or Advance to Next Section
72
73 ELECTRIC FIELDS The electric field strength (E) is the force on a stationary positive test charge per unit charge in an electric field. Fe N E = = q C
74 ELECTRIC FIELDS Notice the similarity to the formula for gravitational field strength. Fg N g = = m kg. Fe N E = = q C
75 Fields surrounding a point charge or sphere
76 Field between two oppositely charged plates
77 Problem What is the electric field strength at a point in a field where an electron experiences a 2 force of 2.6 x 10 N
78 Solution 2 Fe = 2.6 x 10 N 19 q = x 10 C Fe (2.6 x 10 N) E = = 19 = q ( 1.6 x 10 C ) 2
79 ANSWER 17 E = x 10 N C
80 Potential Difference The potential difference between two points in an electric field is the work done (change in potential energy) per unit charge as the particle is moved between the points. V = W q
81 Problem x 10 joules of work are required to move a point charge of 4.8 x 10 C between points A and B in an electric field. What is the potential difference (Voltage) between points A and B? 19
82 Solution 16 W = 1.44 x 10 Joules 19 q = 4.8 x 10 Coulombs x 10 J V = x 10 C = 300 V
83 Problem The voltage ( potential difference ) between points A & B in an electric field is 120 Volts. How many joules of work are required to 12 move a point charge of 8.0 x 10 C between points A and B?
84 Solution V = 120 Volts 12 q = 8.0 x 10 Coulombs W 120 V = x 10 C 10 W = 9.6 x 10 joules
85 Return Home Or Go to Questions
86 Field and Voltage Questions
87
88 E = Fe q x 10 N = Fe 19 C ( 1.6 x 10 C ) 16 ( 4 ) Fe = 4.8 x 10 C
89
90 ( 1 )
91
92 ( 2 )
93
94 ( 2 )
95
96 ( 2 )
97
98 W V = q 17 ( 3 ) W = 1.6 x 10 J x 10 V = W 1.6 x 10 C 19
99
100 V = W q 6 joules V = 2 C V = 3.0 Volts
101
102 W V = 5.0 x 10 V = q 15 W = 1.6 x 10 joules 3 W x 10 C ev = 1.6 x 10 joules ( 4 ) KE = 1.0 x 10 ev
103
104 V = W q 4 J V = 2 C V = 2.0 Volts
105
106  17 W = 3.2 x 10 joules W = 200 ev 200 V = W x 10 C
107
108 Volts (potential difference)
109 Return Home Or Advance to Next Section
110
111 RESISTANCE Resistance is a measure of the opposition that a device or conductor offers to the flow of electric current in a circuit. In terms of current ( I ) and potential difference ( V ) the formula for resistance is: R = V I
112 Resistance In the following circuit the resistance ( R ) is 24 V R = = 8 ohms 3 amps + 24 V I = 3 A 8 _ resistor
113 Resistance In the circuit shown below the wires that connect the battery, the resistor or other elements in a circuit also have a resistance. wire + 24 V I = 3 A 8 _ resistor
114 RESISTANCE Resistance is a measure of the opposition that a device or conductor offers to the flow of electric current in a circuit. The following formula can be used to calculate the resistance of any particular section of wire. R = pl A
115 RESISTANCE The Greek letter ( p ) Rho is the resistivity of the material. It depends on the electronic structure and the temperature of the material. The value for ( p ) can be found in the Physics Reference tables. L is the length of the wire. A is the cross sectional area of the wire. ( cm ) 2 R = pl A
116 RESISTANCE The Physics Reference Tables shows the resistivity (p) for different types of metals. The value is given for a temperature of 20 C. If the temperature increases the resistance of the wire increases. Temperature increases in conductors (wires) can be dangerous. Superconductors are cooled to very low temperatures to decrease their resistance.
117 Example What is the resistance of a copper wire that has a length of 8 cm. and a diameter of 4 mm? copper 8 cm. 4 mm. p = 1.72 x 10 m L = 8 cm. d = 4 mm. R = 8 pl A
118 Solution R = pl A 8 ( 1.72 x 10 m ) (.08 m ) R = (.002 m )
119 Solution R = pl A ( x 10 m ) R = x 10 m R = x 104
120 Example What is the resistance of a gold wire that has a length of 5 cm. and a radius of 1 mm? gold 5 cm. r = 1 mm. R = pl A
121 Solution What is the resistance of a gold wire that has a length of 5 cm. and a radius of 1 mm? gold 5 cm. r = 1 mm. p = 2.44 x 10 m L = 5 cm. r =.001 m R = 8 pl A
122 Solution R = pl A 8 ( 2.44 x 10 m ) (.05 m ) R = (.001 m )
123 Solution R = pl A ( 1.22 x 10 m ) R = x 10 m R = 3.88 x 104
124 Return Home Or Go to Questions
125 Resistance Questions
126
127 V ( 3 ) Resistance in ohms R = I
128
129 R V I 6.0 V R 0.6 A R = 10
130
131 p ( 3 ) R = A
132
133 ( 4 )
134 Return Home Or Advance to Next Section
135
136 SERIES ELECTRIC CIRCUITS
137 What is a circuit? A circuit is a continuous loop.
138 What are the necessary elements of an electric circuit? 1. Potential difference (voltage) between the start and the finish of the loop. This voltage can be supplied by a battery or another supply such as a wall outlet. 2. A resistance such as a lamp, heating element, a motor or electronic device. 3. A complete path from start to finish for the electrons to flow.
139 What is a Series Circuit? In a series circuit all the components of the circuit are in one path. The current begins at the (+) terminal of the voltage source ( battery ) and returns to the (  ) terminal of the voltage source. In a series circuit the current runs through each component of the circuit.
140 SERIES CIRCUIT The two resistors are on the same path. The current must flow through both resistors in order to get back to the source. A + 2 0hms 12 V 4 ohms The ammeter (A) measures 2 amps
141 Current V(tot) = 12 volts R(tot) = 2 ohms + 4 ohms = 6 ohms I = V = 12 Volts = 2 Amps R 6 0hms
142 OHM S LAW V = IR This is the best way to remember this formula. (V) The value on the left side of the equation stands alone.
143 All the equations V = IR V V I = R = R I
144 Resistance in a series circuit R(total) = R1 + R2 + R3.... I (total) = V(total) R(total)
145 Resistance in a Series Circuit What is R(total)? What is I(total) A R hms R2 24 V 4 ohms R3 2 ohms
146 Solution V(total) = 24 volts R1 = 2 ohms R2 = 4 ohm R3 = 2 ohms R(total) = R1 + R2 + R3 = 8 ohms I = V (total) = 24 Volts = 3 Amps R (total) 8 ohms
147 Labeling Voltages and Currents in a Circuit. The current through a resistor in a circuit is given the same number as the resistor. Example: The current through R1 is I1 The current through R2 is I2 The voltage drop across a resistor in a circuit is given the same number as the resistor. Example: The voltage drop across R1 is V1
148 Current in a Series Circuit The current in a series circuit is the same at all points in the circuit. I(total) = I1 = I2 = I3... I(total) = V(total) R(total)
149 Voltage in a Series Circuit The sum of all the voltage drops across all the resistors in a circuit is equal to the total voltage in the circuit. V(total) = V1 + V2 + V3...
150 Summary For a series circuit R(total) = R1 + R2 + R3 I(total) = I1 = I2 = I3.. V(total) = V1 + V2 + V
151 The voltage drop across any resistor is equal to the current through the resistor times the value of the resistor. Example: V1 = I1R1 V2 = I2R2 V3 = I3R3
152 What is the voltage V1 in the circuit below? What is the value of the power supply( V(total))?
153 Solution Since the current in a series circuit is the same in all places I1 = I2 V2 20 V I2 = = =.667 Amps R2 30 ohms Therefore I1 =.667 Amps
154 Solution I1 =.667 A I2 =.667 A V1 = (.667 A) ( 45 ) V1 = 30 V
155 Solution I1 =.667 Amps V1 I1 = R1 V1.667 A = 45 ohms V1 = 30 V V(tot) = V1 + V2 = 50 V
156 Return Home Or Go to Questions
157 Circuits Questions
158
159 V(total) = V1 + V2 + V Volts = 20 V + V V V2 = 70 Volts
160
161 V(total) R(tot) = I (total) R(total) = R1 + R2 + R3... R(total) = 24 V 2 A R(total) = 12 ( 2 ) R3 = 2
162
163 (2) 2 Amps
164
165 I(total) = V(total) R (total) Req = 20 ohms 10 V I = 20 ( 3 ) I =.5 A
166
167 ( 4 )
168
169 ( 1 ) V = 2 Volts
170
171 ( 3 )
172
173 ( 2 )
174
175 ( 4 ) 33 A
176 Return Home Or Advance to a WebBased Questions Link
177 Test yourself By selecting the Electricity Topic in this Link 123/MyQuiz123.php
178 26649
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
More informationTest Review Electricity
Name: Date: 1. An operating television set draws 0.71 ampere of current when connected to a 120volt outlet. Calculate the time it takes the television to consume 3.0 10 5 joules of electric energy. [Show
More informationDynamic 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
More informationCLASS 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
More informationElectricity 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
More informationCHAPTER 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
More informationSection 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
More informationWhich of these particles has an electrical charge?
Which of these particles has an electrical charge? A. Proton. B. Electron. C. Ion. D. All of the above. Which is the predominant carrier of charge in copper wire? A. Proton. B. Electron. C. Ion. D. All
More informationLesson 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
More informationElectromagnetism 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
More informationElectricity. 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
More informationEXPERIMENT 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
More informationWhat 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
More informationRevision 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
More informationIn this unit, we will examine the movement of electrons, which we call CURRENT ELECTRICITY.
Recall: Chemistry and the Atom! What are the 3 subatomic Where are they found in the particles? atom? What electric charges do they have? How was a positive ion created? How was a negative ion created?
More informationWhat are the two types of current? The two types of current are direct current and alternating current.
Electric Current What are the two types of current? The two types of current are direct current and alternating current. Electric Current The continuous flow of electric charge is an electric current.
More informationElectricity. 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.
More informationELECTRICITY UNIT REVIEW
ELECTRICITY UNIT REVIEW S1304: How does the Atomic Model help to explain static electricity? 1. Which best describes static electricity? a) charges that can be collected and held in one place b) charges
More informationElectricity. 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,
More informationA 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
More informationName: 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
More informationPhysics 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
More informationSPH3U1 Lesson 01 Electricity
ELECTRIC CURRENT AND POTENTIAL DIFFERENCE LEARNING GOALS Students will: Define what is meant by electric current. Solve problems involving current, charge and time. Know the difference between electron
More informationElectric 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
More informationConceptual Physical Science 6 th Edition
Conceptual Physical Science 6 th Edition Chapter 8: STATIC AND CURRENT ELECTRICITY 1 Chapter 8: STATIC AND CURRENT ELECTRICITY Chapter 8: Read: All Homework: Four problems from the following set: 4, 6,
More informationReview. 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.
More informationSNC1DI 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
More informationElectrical 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
More informationProtons = Charge Electrons = Charge Neutrons = Charge. When Protons = Electrons, atoms are said to be ELECTRICALLY NEUTRAL (no net charge)
QUICK WRITE: For 2 minutes, write the three parts of an atom and what their charges are. Explain what creates an electric charge (positive or negative) on something. Rules  You MUST write for the entire
More informationAP Physics C  E & M
Slide 1 / 27 Slide 2 / 27 AP Physics C  E & M Current, Resistance & Electromotive Force 20151205 www.njctl.org Slide 3 / 27 Electric Current Electric Current is defined as the movement of charge from
More informationElectroscope Used to are transferred to the and Foil becomes and
Electricity Notes Chapter 17 Section 1: Electric Charge and Forces Electric charge is a variety of independent all with one single name. Electricity is related to, and both () and (+) carry a charge.
More informationPHYSICS 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
More informationPhysics 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
More informationLESSON 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
More informationCHARGE 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
More information4.2.1 Current, potential difference and resistance Standard circuit diagram symbols. Content. Key opportunities for skills development WS 1.
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
More informationNotes on Electricity (Circuits)
A circuit is defined to be a collection of energygivers (batteries) and energytakers (resistors, light bulbs, radios, etc.) that form a closed path (or complete path) through which electrical current
More informationWhat does it mean for an object to be charged? What are charges? What is an atom?
What does it mean for an object to be charged? What are charges? What is an atom? What are the components of an atom? Define the following: Electric Conductor Electric Insulator Define the following: Electric
More informationSection 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
More information5. Positive charges one another.
1. Electric field lines indicate A. Both direction and relative strength B. Neither direction nor strength 5. Positive charges one another. A. Repel B. Attract 2. Whether or not charges will move in a
More informationELECTRICITY & MAGNETISM CHAPTER 8
ELECTRICITY & MAGNETISM CHAPTER 8 E & M  Focus Electric Charge & Force Magnetism Current, Voltage & Power Electromagnetism Simple Electrical Circuits Voltage & Current Transformation Electric Charge &
More informationElectric 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
More informationBasic Electricity. ME 120 Lecture Notes. Portland State University Mechanical and Materials Engineering
Basic Electricity ME 120 Lecture Notes Portland State University Mechanical and Materials Engineering Learning Objectives Successful completion of this module will enable students to Link the basic model
More informationElectric 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
More informationElectromagnetism. Electricity Electromagnetism Magnetism Optics. In this course we are going to discuss the fundamental concepts of electromagnetism:
Electromagnetism Electromagnetism is one of the fundamental forces in nature, and the the dominant force in a vast range of natural and technological phenomena The electromagnetic force is solely responsible
More information16.1 Electrical Current
16.1 Electrical Current Electric Current Electric Current When the ends of an electric conductor are at different electric potentials, charge flows from one end to the other Flow of Charge Charge flows
More informationRead Chapter 7; pages:
Forces Read Chapter 7; pages: 191221 Objectives:  Describe how electrical charges exert forces on each other; Compare the strengths of electric and gravitational forces; Distinguish between conductors
More information(b) State the relation between work, charge and potential difference for an electric circuit.
Question Bank on ChElectricity 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
More informationE40M Charge, Current, Voltage and Electrical Circuits KCL, KVL, Power & Energy Flow. M. Horowitz, J. Plummer, R. Howe 1
E40M Charge, Current, Voltage and Electrical Circuits KCL, KVL, Power & Energy Flow M. Horowitz, J. Plummer, R. Howe 1 Reading For Topics In These Slides Chapter 1 in the course reader OR A&L 1.61.7 
More informationElectric Currents and Simple Circuits
1 Electric Currents and Simple Circuits Electrons can flow along inside a metal wire if there is an Efield present to push them along ( F= qe). The flow of electrons in a wire is similar to the flow
More informationElectric Current & DC Circuits How to Use this File Electric Current & DC Circuits Click on the topic to go to that section Circuits
Slide 1 / 127 Slide 2 / 127 Electric Current & DC Circuits www.njctl.org Slide 3 / 127 How to Use this File Slide 4 / 127 Electric Current & DC Circuits Each topic is composed of brief direct instruction
More informationName: Block: Date: NNHS Introductory Physics: MCAS Review Packet #4 Introductory Physics, High School Learning Standards for a Full FirstYear Course
Introductory Physics, High School Learning Standards for a Full FirstYear Course I. C ONTENT S TANDARDS electricity and magnetism. 5.1 Recognize that an electric charge tends to be static on insulators
More informationChapter 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
More informationChapter 19, Electricity Physical Science, McDougalLittell, 2008
SECTION 1 (PP. 633641): MATERIALS CAN BECOME ELECTRICALLY CHARGED. Georgia Standards: S8P2c Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and
More informationElectric 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
More informationTARGET STUDY MATERIAL
TARGET STUDY MATERIAL CBSE  X SCIENCE AND MATHS VOL I 1) PHYSICS  375 2) CHEMISTRY  79138 3) BIOLOGY  141214 4) MATHS  217325 TARGET EDUCATIONAL INSTITUTION Target Educational institution is the
More informationLecture 24 Chapter 22 Electrostatics II Electric Field & Potential. Chapter 23 Electric Current. From last time
Lecture 24 Chapter 22 Electrostatics II Electric Field & Potential Chapter 23 Electric Current 21Oct10 From last time Electric charge (q), measured in Coulombs (C) Positive and negative charge Electric
More informationMaterial 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
More informationWhich of the following is the SI unit of gravitational field strength?
T52 [122 marks] 1. A cell is connected in series with a 2.0Ω resistor and a switch. The voltmeter is connected across the cell and reads 12V when the switch is open and 8.0V when the switch is closed.
More information4.2.1 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
More informationBasic Electricity. Chapter 2. Al Penney VO1NO
Basic Electricity Chapter 2 The Structure of Matter All matter is composed of Atoms. Atoms consist of: Neutrons; Protons; and Electrons Over 100 different atoms. These are called Elements. Atoms Electrostatic
More informationSTUDY 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:
More informationV R I = UNIT V: Electricity and Magnetism Chapters Chapter 34: Electric Current. volt ohm. voltage. current = I. The Flow of Charge (34.
IMPORTANT TERMS: Alternating current (AC) Ampere Diode Direct current (DC) Electric current Electric power Electric resistance Ohm Ohm s Law Potential difference Voltage source EQUATIONS: UNIT V: Electricity
More informationElectric 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*
More informationElectric Force and Charge. Electric Force and Charge. Electric Force and Charge. Electric Force and Charge. Electric Force and Charge
Hewitt/Lyons/Suchocki/Yeh Conceptual Integrated Science Chapter 7 ELECTRICITY AND MAGNETISM Electric forces can attract some objects and repel others Electric charge: the fundamental quantity that underlies
More information9. Which of the following is the correct relationship among power, current, and voltage?. a. P = I/V c. P = I x V b. V = P x I d.
Name: Electricity and Magnetism Test Multiple Choice Identify the choice that best completes the statement. 1. Resistance is measured in a unit called the. a. ohm c. ampere b. coulomb d. volt 2. The statement
More informationChapter 33  Electric Fields and Potential. Chapter 34  Electric Current
Chapter 33  Electric Fields and Potential Chapter 34  Electric Current Electric Force acts through a field An electric field surrounds every electric charge. It exerts a force that causes electric charges
More informationCircuit Analysis I (ENGR 2405) Chapter 1 Review: Charge, Current, Voltage, Power
Circuit Analysis I (ENGR 2405) Chapter 1 Review: Charge, Current, Voltage, Power What is a circuit? An electric circuit is an interconnection of electrical elements. It may consist of only two elements
More informationScience Olympiad Circuit Lab
Science Olympiad Circuit Lab Key Concepts Circuit Lab Overview Circuit Elements & Tools Basic Relationships (I, V, R, P) Resistor Network Configurations (Series & Parallel) Kirchhoff s Laws Examples Glossary
More informationhttps://www.youtube.com/watch?v=yc2363miqs
https://www.youtube.com/watch?v=yc2363miqs 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
More informationElectric Current Unlike static electricity, electric current is a continuous flow of charged particles (electricity). For current to flow, there must
CURRENT ELECTRICITY Electric Current Unlike static electricity, electric current is a continuous flow of charged particles (electricity). For current to flow, there must be a power source and there must
More informationTOPIC 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.
More informationE40M Charge, Current, Voltage and Electrical Circuits. M. Horowitz, J. Plummer, R. Howe 1
E40M Charge, Current, Voltage and Electrical Circuits M. Horowitz, J. Plummer, R. Howe 1 Understanding the Solar Charger Lab Project #1 We need to understand how: 1. Current, voltage and power behave in
More information2015 EdExcel ALevel Physics Topic 3. Charge and current
2015 EdExcel ALevel Physics Topic 3 Charge and current 9/17/2018 Electric Charge Atoms consists of Negativelycharged electrons and Positively charged protons. Atoms have the same number of protons and
More informationWHAT ARE THE EFFECTS OF MOVING CHARGES?
ELECTRICITY WHAT ARE THE EFFECTS OF MOVING CHARGES? ELECTRICAL CHARGES Most atoms have the same number of protons and electrons. They often lose and gain electrons. When this happens, the atom s charge
More informationCircuits. Electric Current & DC Circuits. Slide 1 / 127. Slide 2 / 127. Slide 3 / 127. Slide 4 / 127. Slide 5 / 127. Slide 6 / 127
Slide 1 / 127 Slide 2 / 127 New Jersey Center for Teaching and Learning Electric Current & DC Circuits www.njctl.org Progressive Science Initiative This material is made freely available at www.njctl.org
More informationStandard circuit diagram symbols Content Key opportunities for skills development
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
More informationEngineering Fundamentals and Problem Solving, 6e
Engineering Fundamentals and Problem Solving, 6e Chapter 17 Electrical Circuits Chapter Objectives Compute the equivalent resistance of resistors in series and in parallel Apply Ohm s law to a resistive
More informationPhysics 7B1 (A/B) Professor Cebra. Winter 2010 Lecture 2. Simple Circuits. Slide 1 of 20
Physics 7B1 (A/B) Professor Cebra Winter 2010 Lecture 2 Simple Circuits Slide 1 of 20 Conservation of Energy Density In the First lecture, we started with energy conservation. We divided by volume (making
More informationElectrostatics 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
More informationELECTRICITY. 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,
More informationOhm s Law and Electronic Circuits
Production Ohm s Law and Electronic Circuits Page 1  Cyber Security Class ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. Thomas Edison Page 2  Cyber Security
More informationChapter 21 Electric Current and Circuits
Chapter 21 Electric Current and Circuits 1 As an introduction to this chapter you should view the following movie. If you cannot click on the link, then copy it and paste it into your web browser. http://www.ionaphysics.org/movies/vir.mp4
More informationUnit 3 BLM Answers UNIT 3 BLM 346
UNIT 3 BLM 346 Unit 3 BLM Answers BLM 33, Charge Transfer Diagrams 1. Positively charged objects should have more (+) than ( ). Negatively charged objects should have more ( ) than (+). 2. They must
More informationObjects usually are charged up through the transfer of electrons from one object to the other.
1 Part 1: Electric Force Review of Vectors Review your vectors! You should know how to convert from polar form to component form and vice versa add and subtract vectors multiply vectors by scalars Find
More informationNotes on Electricity (Circuits)
A circuit is defined to be a collection of energygivers (active elements) and energytakers (passive elements) that form a closed path (or complete path) through which electrical current can flow. The
More informationIdeal wires, Ideal device models, Ideal circuits. Ideal models for circuit elements Wires
Ideal wires, Ideal device models, Ideal circuits Ideal models for circuit elements Wires Currents and Voltages Joints Resistors Voltage sources Current sources. EE 42 Lecture 1 1 Cast of Characters Fundamental
More information670 Intro Physics Notes: Electric Current and Circuits
Name: Electric Current Date: / / 670 Intro Physics Notes: Electric Current and Circuits 1. Previously, we learned about static electricity. Static electricity deals with charges that are at rest. 2. Now
More informationBasic Electricity Video Exam
Name: Class: Date: Basic Electricity Video Exam Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Matter is made of. a. plasma, gas, and solid b. solid,
More informationPreliminary 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 120.
More informationMITES Middle School Introduction To Engineering Systems
MITES Middle School Introduction To Engineering Systems 2 Expectations for Behavior Be Respectful To teacher, To Peers, To Facilities Follow 1 st Request From Teachers or Peers Golden Rule Treat others
More informationChapter 3: Electric Current And DirectCurrent Circuits
Chapter 3: Electric Current And DirectCurrent Circuits 3.1 Electric Conduction 3.1.1 Describe the microscopic model of current Mechanism of Electric Conduction in Metals Before applying electric field
More informationObjects can be charged by rubbing
Electrostatics Objects can be charged by rubbing Charge comes in two types, positive and negative; like charges repel and opposite charges attract Electric charge is conserved the arithmetic sum of the
More informationEE301 RESISTANCE AND OHM S LAW
Learning Objectives a. Describe the concept of resistance b. Use Ohm s law to calculate current, voltage, and resistance values in a circuit c. Discuss the difference between an open circuit and a short
More informationPhysics Electrostatics
Homework Procedure: Read pages specified in Honors Physics Essentials by Dan Fullerton. Questions labeled TQ will be questions about the text you read. These TQ s can be answered in one word, one phrase,
More informationContinuous flow of electric charges. Current Electricity
Continuous flow of electric charges Current Electricity Did You Know? The voltage across a muscle cell in your body is about 70 millivolts. A millivolt (mv) is one thousandth of a volt. AC and DC DC Direct
More informationCircuit Lab Free Response
Circuit Lab Free Response Directions: You will be given 40 minutes to complete the following written portion of the Circuit Lab exam. The following page contains some helpful formulas that you may use
More informationClosed loop of moving charges (electrons move  flow of negative charges; positive ions move  flow of positive charges. Nucleus not moving)
Unit 2: Electricity and Magnetism Lesson 3: Simple Circuits Electric circuits transfer energy. Electrical energy is converted into light, heat, sound, mechanical work, etc. The byproduct of any circuit
More informationLook over Chapter 26 sections 17 Examples 3, 7. Look over Chapter 18 sections 15, 8 over examples 1, 2, 5, 8, 9,
Look over Chapter 26 sections 17 Examples 3, 7 Look over Chapter 18 sections 15, 8 over examples 1, 2, 5, 8, 9, 1)How to find a current in a wire. 2)What the Current Density and Draft Speed are. 3)What
More information