Lesson Plan
Chapter 20 Electromagnetic Induction
Chapter Opener
__ Tapping Prior Knowledge, TE Review previously learned concepts and check for
preconceptions about the chapter content.
__ Discovery Lab, Electricity and Magnetism, ANC Students observe the effects of
current through a wire, discover how the core of an electromagnet affects the magnet’s
strength, and construct a simple speaker. (BASIC)
__ Visual Concepts CD-ROM This CD-ROM consists of multimedia presentations of core
physics concepts. (BASIC)
Section 1 Electricity and Magnetism
PACING
Regular Schedule:
Block Schedule:
with lab(s): 3 days
with lab(s): 1 1/2 days
without lab(s): 2 days
without lab(s): 1 day
OBJECTIVES
1. Recognize that relative motion between a conductor and a magnetic field induces an
emf in the conductor.
2. Describe how the change in the number of magnetic field lines through a circuit loop
affects the magnitude and direction of the induced electric current.
3. Apply Lenz’s law and Faraday’s law of induction to solve problems involving
induced emf and current.
NATIONAL SCIENCE EDUCATION STANDARDS
UCP 1: Systems, order, and organization
UCP 2: Evidence, models, and explanation
UCP 3: Change, consistency, and measurements
UCP 4: Evolution and equilibrium
UCP 5: Form and function
SAI 1:
Abilities to do scientific inquiry
SAI 2:
Understanding about scientific inquiry
ST 1:
Abilities of technological design
ST 2:
Understanding about science and technology
KEY SE = Student Edition TE = Teacher Edition ANC = Ancillary Workbook OSP = One-Stop Planner
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Physics
1
Chapter 20
Lesson Plan
SPSP 5: Science and technology in society
FOCUS (5 minutes)
__ Overview Review the objectives listed in the Student Edition. (GENERAL)
MOTIVATE (5 minutes)
__ Visual Strategy, Figure 1, TE This feature tests students’ understanding of the
conditions required to induce current in a circuit. (GENERAL)
__ Visual Strategy, Figure 3, TE Students answer why a loop parallel to the field that
moves as shown in the figure experiences no current around the loop. (GENERAL)
TEACH (115 minutes)
__ PowerPoint® Resources Use the customizable presentation to help students master the
concepts in this section. (GENERAL)
__ Transparency 107, Ways of Inducing a Current in a Circuit This transparency
summarizes three ways of inducing a current in a circuit.
__ Transparency 108, Direction of Induced Current and Their Magnetic Fields This
transparency illustrates the direction of induced currents and their magnetic fields for both
approaching and receding magnetic fields.
__ Transparency Master 64A, Magnetic Field of a Conducting Loop This transparency
master illustrates the variables involved in Faraday’s law of magnetic induction for a
single loop of a circuit.
__ Demonstration, Induced Current, TE This demonstration uses a flashlight bulb in a
holder, a coil of wire, a bar magnet, and connecting wires to show students an example of
induced current. (GENERAL)
__ Conceptual Challenge, p. 711, SE These conceptual questions challenge students to
apply the section content to real-world applications. (ADVANCED)
__ Demonstration, Lenz’s Law, TE This demonstration uses a flashlight bulb in a holder, a
coil of wire, a bar magnet, a diode, and connecting wires to illustrate Lenz’s law
experimentally. (GENERAL)
__ Sample Set A, Induced emf and Current, SE This sample and practice problem set
covers induced emf and current. (GENERAL)
__ Classroom Practice, Induced emf and Current, TE Use this problem as a teamwork
exercise or for demonstration at the board or on an overhead projector. (GENERAL)
__ Skills Practice Lab, Electromagnetic Induction, SE Students use a magnet, a
conductor, and a galvanometer to explore electromagnets and the principle of selfinduction. (GENERAL)
__ Datasheet, Electromagnetic Induction, ANC Students use the datasheet to complete the
in-text lab. (GENERAL)
KEY SE = Student Edition TE = Teacher Edition ANC = Ancillary Workbook OSP = One-Stop Planner
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Physics
2
Chapter 20
Lesson Plan
CLOSE (10 minutes)
__ Section Review, SE Students answer review questions, critical-thinking questions, and
interpreting-graphics questions that assess their understanding of the section objectives.
(GENERAL)
__ Study Guide, Electricity and Magnetism, ANC Use this worksheet to review the main
concepts presented in the section. (GENERAL)
__ Section Quiz, ANC Use this quiz to assess students' understanding of the section.
(BASIC)
OTHER RESOURCE OPTIONS
__ Holt Online Learning Students can access interactive problem-solving help and active
visual concept development with the Holt Physics Online Edition available at
go.hrw.com.
__ Problem Workbook, Sample Set A: Induced emf and Current, ANC This worksheet
provides an additional example problem and several practice problems that cover induced
emf and current. (GENERAL)
__ Problem Bank, Sample Set A: Induced emf and Current, OSP This worksheet
provides a third example problem and several practice problems that cover induced emf
and current. (GENERAL)
__ SciLinks, Online Students can visit www.scilinks.org to find internet resources related
to the chapter content.
Topic: Electromagnetic Induction
SciLinks Code: HF60481
KEY SE = Student Edition TE = Teacher Edition ANC = Ancillary Workbook OSP = One-Stop Planner
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Physics
3
Chapter 20