Which devices might use electromagnets? pick all that apply. 1. audio speakers 2. plastic combs 3. trains 4. doorbells 5.revolving chairs 6.cranes

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

Explanation:

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic