Brainscape's Knowledge GenomeTM

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


See full index

Physics > Electric and Magnetic Fields > Flashcards

Electric and Magnetic Fields Flashcards

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

Why is a soft iron cores to solenoids?

A

increase the strength

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

Is iron magnetically soft or hard?

A

softly

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

How do you make and induced magnetic?

A

Place a magnetic material into a magnetic field

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

What is a solenoid?

A

a coil of wire with a strong uniform magnetic field

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

Which 4 metals are magnetic?

A

Nickel
Cobalt
Iron
Steel

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

How could you increase the strength of the magnetic?

A

Increase the current

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

How can a compass visualise field lines

A

the need always points along a field line towards the south pole

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

What is an electromagnet

A

is a solenoid with an iron core inside

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

What is the national grid?

A

the network of transformers, pylons and wires

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

What does a step up transformer do?

A

used to increase the voltage and decrease the current electricity

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

How can you change the direction of magnetic fields?

A

Change the direction of the current

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

Will a step down transformer have more turns on from the primary or secondary coil?

A

the primary coil

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

Which direction do magnetic field lines point?

A

From the north pole to the south pole

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

What do we call 2 poles of a magnet?

A

North and South

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

What is a magnetic material?

A

any material that can be influenced by a magnetic field and had the potential to be a magnetic

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

What does a step-down transformer do?

A

used to decrease the voltage and increase currents

17
Q

How can field lines show you the strength of a magnetic field?

A

The denser the field lines the stronger the magnetic field will be

18
Q

What time of day is electricity demand usually highest?

A

Late in the afternoon and early evening

19
Q

What are magnetic field lines?

A

arrows that show the magnetic field around an object

20
Q

What is electromagnetism?

A

an electrical current flows through a wire and a magnetic field is produced

21
Q

What is a permanent magnet?

A

produce their own magnetic field

22
Q

What is an induced magnet?

A

produce a magnetic pic field in the presence of another magnet

23
Q

Give 4 ways to increase the strength of solenoid

A

Increase the current
Increase number of turns
Reduce length
Add a soft iron core

24
Q

What is a magnet?

A

any material or object that produces a magnetic field

Physics (7 decks)

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