Section 20.3 Electric Circuits ... the circuit and current returning to ground are equal. 19. The transfer of excess charge through a conductor to Ear...
Chapter 20 Chapter 20 - Electricity Electricity Section 20.2 ... •• According to Ohm’s Law, ... Electric Current & Circuits 20.2 & 20.3
Section 20.1 Electric Charge and Static Electricity ... This section explains how electric charge is created and ... What is the law of conservation of
Section 20.2 Electric Current and Ohm’s Law (pages 604–607) This section discusses electric current, resistance, and voltage. It also uses
Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. Section 20.1 Electric Charge and Static Electricity. (pages 600–603). This section explains how electric charge is created and how positive and negative charges affect
Central Virginia Electric Cooperative 2016. 1. Simple Circuits. Strand. Force, Motion, and Energy. Topic. Constructing circuits. Primary SOL 4.3 The student will ... circuit, closed circuit, open circuit, series circuit, parallel circuit, switch, ele
Section 20.2 Electric Current (pages 604–607) This section discusses electric current, resistance, and voltage. Reading
these processors that the inished breaded product will be subjected to a metal detector. The primary processor would not need to . DETERMINE WHETHER THE POTENTIAL
Section 20.2 Electric Current and Ohm’s Law (pages 604–607) This section discusses electric current, ... electric field 16
Section 20.2 Electric Current and Ohm’s Law (pages 604–607) This section discusses electric current, resistance, and voltage. It also uses
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PHY2049: Chapter 27. 9. Series Circuit. →Simple series situation. ◇1 battery and two resistors R. 1 and R. 2. ◇Common current I. →Total voltage E = V. 1. + V . 2 ... PHY2049: Chapter 27. 11. Resistors in series. →If the light bulbs are all the same i
Chapter 20 Outline – Colonial Encounters I. ... The period 1750–1900 saw a second, distinct phase of European colonial conquest. 1. focused on Asia and Africa
There are two types of electrical circuit, parallel circuits and series ... In an electrical circuit, the presence of a resistor limits the current and prevents damage related to short circuits. The unit used to measure resistance is the ohm ( symbol
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Chapter 5 Protection Circuit Design 5-2 1 Short circuit (overcurrent) protection 1-1 Short circuit withstand capability In the event of a short circuit, first the
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Electric Charges and Fields 3 neutralise or nullify each other’s effect. Therefore the charges were named as positive and negative by the American scientist
Chapter 19 Electric Charges, Forces, and Fields Outline 19-1 Electric Charge 19-2 Insulators and Conductors 19-3 Coulomb’s Law (and net vector force)
lightning to the submicroscopic world of atoms and molecules. Current electricity, which is produced by batteries and generators, will be explored in later chapters. Section 20.1 Electric Charge. 541. Which forces act over a distance? Question. What
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Name ___________________________ Chapter 20
Class ___________________
Date _____________
Electricity
Section 20.3 Electric Circuits (pages 609–613) This section describes circuit diagrams and types of circuits. It also explains calculation of electric power and electric energy and discusses electrical safety.
Reading Strategy
(page 609)
Relating Text and Visuals As you read about household circuits, complete the table by listing three things the diagram in Figure 13 helps you understand about circuits. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. Understanding a Circuit Diagram What Can Be Seen in the Circuit Diagram? Wire bringing current from outside Grounding wire Separate circuit for the lights Separate circuit for the dryer
symbols 1. Circuit diagrams use to represent parts of a circuit, including a source of electrical energy and devices that are run by the electrical energy.
Match each symbol to what it indicates on a circuit diagram. Symbol What Symbol Indicates c b a
2. 3. 4.
Series Circuits
a. The direction of current b. A negative terminal c. A positive terminal (page 610)
5. Is the following sentence true or false? In a series circuit, if one element stops functioning, then none of the elements can operate. true
6. Explain why the bulbs shine less brightly when more bulbs are added to a series circuit. Adding more bulbs increases the resistance, which decreases the current.
Parallel Circuits
(page 610)
7. Is the following sentence true or false? Circuits in a home are rarely false wired in parallel. 8. If one element stops functioning in a parallel circuit, the rest of the can still operate elements .
Physical Science Guided Reading and Study Workbook
■
Chapter 20 183
Name ___________________________ Chapter 20
Class ___________________
Date _____________
Electricity
Power and Energy Calculations
(pages 611–612)
9. The rate at which electrical energy is converted to another form of electric power energy is called . 10. The SI unit of electric power is the joule per second, or watt W , which is abbreviated . 11. Is the following sentence true or false? Electric power is calculated true by multiplying current times voltage. 12. Write the formula for calculating electrical energy. EPt
13. The unit of energy usually used by electric power companies is the kilowatt-hour .
Electrical Safety
(pages 612–613)
14. Circle the letters of what could happen if the current in a wire exceeds the circuit’s safety limit. a. The wire could overheat. b. The wire could get cooler. c. A fire could start. d. A fuse could blow. 15. Explain how a fuse prevents current overload in a circuit. A wire in the center of the fuse melts, which stops the flow of charge in the circuit.
18. Is the following sentence true or false? A ground-fault circuit interrupter shuts down the circuit if the current flowing through the circuit and current returning to ground are equal. false
19. The transfer of excess charge through a conductor to Earth is called grounding . 20. Complete the following table about equipment used to prevent electrical accidents. Equipment to Prevent Current Overload
Equipment to Protect People from Shock
Equipment to Prevent Short Circuits
a. Fuse
b. Insulation
e. Insulation
Circuit breaker
c. Three-prong plug Grounding wire d. Ground-fault circuit interrupter
184
Physical Science Guided Reading and Study Workbook
16. A switch that opens to prevent overloads when current in a circuit circuit breaker is too high is called a(n) . 17. Explain why touching an electrical device with wet hands is dangerous. Your hands conduct electricity more readily when they are wet.
