The electromagnet
Answers are for parents and teachers.
1
The wire has 60 turns of 5 cm each. Length in m?
3
2
20 turns held 4 clips. How many clips with 50 turns (strength proportional to turns)?
10
3
Which rule gives the poles of an electromagnet?
The right-hand rule.
4
Give two uses of electromagnets.
Lifting scrap iron with a crane; an electric bell or a relay.
5
Write three safety rules for an electromagnet experiment.
Under the teacher’s supervision; battery not above 4.5 V, key closed briefly; never connect to a socket, do not touch hot wire.