magnetism 🧲

Question 1

what are the properties of magnets?

Answer 1

1) magnets attract magnetic materials (nickel iron cobalt steel)
2) magnets have two poles at which magnetic effect is strongest at
3) a freely-suspended magnet comes to rest in a north-south direction
4) like poles repel and unlike poles attract

Question 2

how to test for magnetism?

Answer 2

repel

Question 3

define magnetic induction

Answer 3

magnetic induction is the process where an object made of magnetic material becomes a magnet when it is near or in contact with a magnet

Question 4

methods of magnetisation

Answer 4

1) stroking: stroke in one direction, pole produced at the end is opposite to the one it was stroked with
2) electrical method with direct current (RHGR to determine poles)

Question 5

methods of demagnetisation

Answer 5

1) heating and letting the magnet cool in the east-west direction
2) hammering the magnet in the east-west direction
3) placing magnet in solenoid with alternating current and withdrawing it slowly in the east-west direction

Question 6

soft and hard magnetic materials

Answer 6

iron is hard and steel is hard (hopefully the paper isn’t though!)