Transcript Standard EPS Shell Presentation

Physics A First Course
Electricity and Magnetism
Chapter 17
Electricity and Magnetism
Electromagnets and Induction
 17.1
Electric Current and Magnetism
 17.2
Electric Motors
 17.3
Electric Generators and Transformers
17A Investigation: Electromagnetic Forces
Key Question:
How does an electric motor work?
*Students read text
section 17.1 AFTER
Investigation 17A
17A Investigation Topics

Assemble parts of an electric motor.

Wrap copper wire for coil of an electric motor.

Calculate the speed of each electric motor.
Chapter 17.1 Objectives and Vocabulary

Describe the effect an
electric current in a wire
has on a compass.

Explain how to change the
strength and direction of a
wire's magnetic field.

Determine whether two
wires or coils will attract or
repel.
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
coil
solenoid
Effect of current on compasses
Chapter 17.2 Objectives and Vocabulary
Describe the role of magnets
in electric motors.
 Explain how electric motors
operate.
 Learn the main THREE parts
of an electric motor.
 Explain how a batterypowered motor works.

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
electric motor
rotor
commutator
armature
brushes
17B Investigation: Electromagnetic Induction
Key Question:
How does an electric generator work?
*Students read text section 17.3
AFTER Investigation 17B
17B Investigation Topics

Physically power an electric generator.

Create AC electricity.

Calculate the voltage generated.

Measure and calculate speed of generator.

Graph voltage vs. speed for generator.

Experiment with varying generator
configurations.

Evaluate different generator configurations.
Chapter 17.3 Objectives and Vocabulary
Explain how a magnet can be
used to produce current in a
coil.
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Describe the design of a simple
generator.

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Calculate the number of turns
or voltage of a coil in a
transformer.
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
electromagnetic
induction
Faraday's law of
induction
generator