P3.2.8 - P3.2.9 Electromagnetism 1 & 2 Flashcards Preview

SHHS - Science - P3.2 Turning Points in Physics - Year 9 > P3.2.8 - P3.2.9 Electromagnetism 1 & 2 > Flashcards

Flashcards in P3.2.8 - P3.2.9 Electromagnetism 1 & 2 Deck (12):
1

electromagnetic waves e.g. radiowaves can be detected by electrical equipment through...

aerials

2

Who discovered electromagnetic induction?

Michael Faraday

3

electromagnetic waves are sent from electrical devices via an instrument called a...

transmitter

4

When an electric current moves backwards and forwards (alternating current) they can generate...

waves e.g. radiowaves

5

What is peer review?

When scientists check each others work

This makes their findings more reliable.

6

A current that is constantly changing direction is called an...

alternating current

7

What is electromagnetism?

When a magnetic field is produced around a wire with a current flowing through it.

8

Wifi waves work at a different _________ to radiowaves

frequency

9

Who was the scientist that discovered electromagnetism?

Hans Christian Oersted

10

How can you increase the current generated by electromagnetic induction?

Use a stronger magnet

Increase the number of coils in the magnet

Increase the speed at which you move the magnet through the coil

11

Which type of electromagnetic wave is used in communications?

Radiowaves

12

How can you generate an electric current in a wire?

Coil the wire

Pass a magnet through the coil

There will be no current when the magnet is stationary