Music and Coils

2 coils of wire, a speaker, and a hand-held radio

Concept Overview:

1. Electromagnetic Induction

2. Wireless Transmission of Sound

Lecturer Procedure

Step(s) to Follow	Expected Result
1. Turn on radio and adjust volume. 2. Adjust tuner to get a good signal. 3. Turn on speaker 3. Move coils closer and farther from each other and listen to the result	The music will be louder when the coils are closer.
Variation: Ask for a volunteer to use their personal device (that has a headphone port) for the demo rather than the transistor radio.

Step(s) to Follow

Expected Result

1. Turn on radio and adjust volume.

2. Adjust tuner to get a good signal.

3. Turn on speaker

3. Move coils closer and farther from each other and listen to the result

The music will be louder when the coils are closer.

Variation: Ask for a volunteer to use their personal device (that has a headphone port) for the demo rather than the transistor radio.