And some tape holds everything to the bottom of the can. A close-up of the copper wire coil and magnet taped into position on the bottom of the can is shown at the right. The mini-phone jack plugs into the headphone socket on a small transistor radio. Nothing needs to be tape recorded, we are merely using the meter for taking measurements. These measurements are recorded and needed by the students.
All equipment is crude, cheap, and available at most schools.
Students will be able to experiment with the following variables - I prefer to have my students create this variable list rather than providing it for them . This information can also be graphed. Most students are interested in listening to music and are naturally interested in creating such speakers. Click here to go to the student page.