Physics - Summer Exam Unknown Topics

Question 1

What does it mean to “induce a pole”?

Answer 1

Creating a temporary magnet by placing a magnetic material near a magnet

Question 2

How do you make a simple compass?

Answer 2

Magnetise a needle and float it

Question 3

What’s the difference between a temporary magnet and a permanent magnet?

Answer 3

Temporary magnet lose magnetism really easily
Permanent magnets keep it

Question 4

What is hard magnetism?

Answer 4

It keeps magnetism (eg. steel)

Question 5

What is soft magnetism?

Answer 5

It’s easy to magnetise and demagnetise (eg. Iron)

Question 6

How do you make an electromagnet?

Answer 6

Wrap wire around iron and connect to a battery - electricity creates a magnetic field

Question 7

What’s the difference between a solenoid and an electromagnet

Answer 7

Solenoid - coil of wire
Electromagnet - solenoid with iron core

Question 8

What are two properties of electromagnets?

Answer 8

1. They can be turned on/off
2. They are stronger with more coils

Question 9

What causes reverberation?

Answer 9

Reflected sound waves bouncing off surfaces

Question 10

What is a longitudinal wave?

Answer 10

A wave where the particles move parallel to the direction of the wave