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

1
Q

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

A

aerials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Who discovered electromagnetic induction?

A

Michael Faraday

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

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

A

transmitter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

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

A

waves e.g. radiowaves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is peer review?

A

When scientists check each others work

This makes their findings more reliable.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A current that is constantly changing direction is called an…

A

alternating current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is electromagnetism?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Wifi waves work at a different _________ to radiowaves

A

frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Who was the scientist that discovered electromagnetism?

A

Hans Christian Oersted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How can you increase the current generated by electromagnetic induction?

A

Use a stronger magnet

Increase the number of coils in the magnet

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which type of electromagnetic wave is used in communications?

A

Radiowaves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How can you generate an electric current in a wire?

A

Coil the wire

Pass a magnet through the coil

There will be no current when the magnet is stationary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly