Modulated Coil

This Modulated Coil activity & project also includes:

Transmit sound with an electromagnet. Class members follow the provided direction and build an electromagnet that will transmit sound though a cassette-tape player. As as extension they create an air core electromagnet and compare its performance to the original.

7 Views 9 Downloads NGSS: Adaptable
Instructional Ideas

  • Lead a discussion on products that use a similar type of device
  • Research other types of modulators that can transmit sound
Classroom Considerations

  • Requires a cassette-tape player

  • Provides two different directions for how to connect the coil to the sound source
  • You can enlarge the images to provide detail on how the connections are made

  • Does not contain any tips on what to look for to correct the problem if the electromagnet doesn't work