Magnetism

Question 1

What is a magnetic material?

Answer 1

A magnetic material is a material that is attracted to a magnet and can be made into a magnet.

Question 2

What are the three main magnetic materials and what is the fourth?

Answer 2

1. Nickel
2. Iron
3. Cobalt
4. Steel is an ALLOY-not a raw material.

Question 3

What is steel made up of?

Answer 3

Iron and copper

Question 4

What is a magnetic field?

Answer 4

A magnetic field is an invisible area around a magnet were force is felt.

Question 5

What are the ends of a bar magnet called?

Answer 5

Poles

Question 6

What is the rule for the different poles?

Answer 6

Like poles repel, unlike poles attract.

Question 7

Why are electricity and magnetism linked?

Answer 7

An centric current produces a magnetic field.

Question 8

What is an electromagnet?

Answer 8

An electromagnet is a material that only behaves as a magnet when electricity flows through it.

Question 9

What is a coil of wire known as?

Answer 9

A solenoid.

Question 10

What factors can in case the strength of an electromagnet?

Answer 10

1. Putting a soft iron core in.
2. Increasing the number of turns of wire.
3. Increasing the current flowing through the wire.
4. Bend the straight magnet into a horseshoe shape.

Question 11

What advantage does an electromagnet have over a permanent magnet?

Answer 11

Permanent magnets cannot be switched off.