Communication - Vibration, Electronic Signals, and Electromagnetic Radiation

©1995 The Regents of the University of California

General Preparation Instructions

• Prepare daily lesson plans, handouts and tests
• Make transparencies
• Obtain and test overhead projector
• Gather and prepare demonstration equipment (see lab handouts)
• Gather and make laboratory materials
• Try out all demonstration and laboratory materials

Pie Pan Speaker Demonstration:

List of Materials

• 1 permanent magnet
• 1 coil of wire
• 1 pie pan
• an amplified signal source

Setup

• Before presenting this lab, build and test your own pie pan speaker to be used as a demonstration
• This demonstration should be followed by the Making a Speaker Laboratory

Estimated Class Time

One Class Period

The String Walkie Talkie Laboratory:

List of Materials:

• 2 cups
• toothpick
• kite string
• secret messages

Setup

• Before presenting this lab, build and test your own string walkie talkie to be us ed as a demonstration

Estimated Class Time

One Class Period

Making a Speaker Laboratory:

List of Materials

• 1 permanent magnet
• 2 feet of wire
• 1 pencil
• tape or glue
• 1 Styrofoam or paper cup
• 1 signal source (tape player)
• 1 plug with alligator clips for tape player

Setup

• Before presenting this lab, build and test your own speaker, and use it as for the demonstration.

Estimated Class Time

Two Class Periods

For more information about this Communications Lesson Plan:

Summary

Preparation

Lesson Plan

References

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