Topic 7 Flashcards Preview

gcse physics year 11 > Topic 7 > Flashcards

Flashcards in Topic 7 Deck (21):
1

What 2 poles do all magnets have

North and south

2

What do all magnets produce

A magnetic field

3

What is a magnetic field

A region where other magnets or magnetic materials such as iron experience a non-contact force

4

The closer the magnetic field lines are the ...

Stronger the magnetic field

5

The further away from a magnetic you get ...

The weaker the magnetic field

6

When is the magnetic field at its strongest

At the poles of the magnet. This means that the magnetic forces are also strongest at the poles

7

What 2 ways can a force be

Attractive or repulsive

8

When do forces repel each other

When 2 poles are the same

9

What are the 2 types of magnets

Permanent magnets and induced magnets

10

What are permanent magnets

They produce their own magnetic field

11

What are induced magnets

Magnetic materials that turn into a magnet when they’re put into a magnetic field

12

What is ‘the force like between permanent and induced magnets’

Always attractive

13

How do induced magnets lose their magnetism and stop producing a magnetic field

If you take away the magnetic field

14

What happens when you take away the magnetic field in induced magnets

Thy quickly lose their magnetism and stop producing a magnetic field

15

What happens when a current flows through a wire

A magnetic field is created around the wire

16

What is the magnetic field that is created around the wire made up of

Concrete circles perpendicular to the wire, with the wire in the centre

17

How does the strength of the magnetic field produced change

With the current and the distance from the wire

18

The larger the current through a wire or the closer to the wire you are ...

The stronger the magnetic field

19

How can you increase the strength of the magnetic field that a wire produces

By wrapping the wire into a coil called solenoid

20

Force (N) =

Magnetic flux density(T) X Current(A) X length(M)

21

What does the force acting on a conductor in a magnetic field depend on

-the magnetic flux density
-the length of the conductor
-the size of the current