Respuesta :
Answer:
1. audio speakers
3. trains
4. doorbells
6. cranes
Explanation:
Electromagnets are the magnets which can work when the electric current pass through them. The strength of electromagnet depends on the amount of current passing through it, number of turns in the coil and the nature of material of core.
Electromagnet is used in
1. audio speakers
2. trains
3. doorbells
4. cranes
