yes it does
No.
An electromagnet drives the stereo speaker to provide the sound.
electromagnetism
Use an electromagnet.
Electromagnet
The electromagnet is only part of the mechinism the whole item is called a solenoid which has a magnetized rod inside the electromagnet when 24 volts is applied the solenoid springs out of the coils of the electromagnet striking the bell. When released the rod returns by use of a spring and strikes another bell. Ding, Dong.
When you need a magnet you can turn on and off an electromagnet is used.
iron
To have a magnet that can be turned on and off.
Yes, you would be able to use electromagnets in space.
Iron - use a bunch of iron nails, wrapped many times with insulated copper wire, if making your own electromagnet.