Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics CGP Paper 2 > Section 6 > Flashcards

Section 6 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What do magnets affect?

A

Magnetic materials and other magnets.

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

What do both poles attract?

A

Magnetic materials.

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

What happens when magnets and magnetic material are closer together?

A

The stronger the induced magnetism will be.

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

Around a straight wire what is there?

A

A magnetic field.

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

What is the field made up of around a straight wire?

A

Concentric circles.

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

The magnetic field in the centre of a flat circular coil of wire is similar to what?

A

That of a bar magnet.

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

What are there around a coil?

A

Concentric ellipses of magnetic field lines.

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

What is the magnetic field inside a current-carrying solenoid?

A

Strong and uniform.

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

Outside the solenoid what is the field?

A

Similar of a bar magnet.

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

What is the solenoid a type of?

A

An electromagnet.

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

What is a soft magnetic material?

A

One which loses its induced magnetism quickly.

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

What is a hard magnetic material?

A

It keeps its magnetism permanently.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is an example of a soft magnetic material?

A

Iron.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is an example of a hard magnetic material?

A

Steel.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why is iron used in transformers?

A

It needs to magnetise and demagnetise.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How can you increase the strength of a magnetic field around a solenoid?

A

Add a soft iron core.

17
Q

Why does a wire move?

A

Charged particles moving through a magnetic field will experience a force, as long as they’re not moving parallel to the field.

18
Q

What do transformers do?

A

Change the size of the voltage of an alternating current.

19
Q

What coils are on a transformer and what are they joined by?

A

Primary and secondary joined with an iron core.

20
Q

What happens when an a.c voltage is applied across the primary coil?

A

The magnetically soft iron core magnetises and demagnetises quickly. This induces an a.c voltage in the secondary coil.

21
Q

What do step up transformers do?

A

They have more turns on the secondary coil than the primary coil.

22
Q

What a step down transformer?

A

Steps the voltage down. They have more turns on the primary coil than the secondary.

23
Q

Vp / Vs =

A

Np / Ns

24
Q

Vp x Ip

A

Vs x Is

25
Q

What is the problem with the voltage produced by power stations?

A

It is too low to be transmitted efficiently.

26
Q

What is used to boost the voltage before it is transmitted?

A

A step up transformer.

27
Q

Why is a stepdown transformer used at the end of the journey?

A

To reduce the voltage so it is more useful and safer to use.

Physics CGP Paper 2 (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions