Topic 10 & 11 - Magnetism and the Motor Effect and Electromagnetic Induction Flashcards Preview

GCSE Combined Physics (Edexcel) > Topic 10 & 11 - Magnetism and the Motor Effect and Electromagnetic Induction > Flashcards

Flashcards in Topic 10 & 11 - Magnetism and the Motor Effect and Electromagnetic Induction Deck (50)
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1

1 What are the two ends of a bar magnet called?

north-seeking pole and south-seeking pole, or just north pole and south pole

2

2 Name two magnetic materials.

any two from iron, cobalt, nickel, steel

3

3 What happens if you arrange two magnets with their north poles close to each other?

They repel each other.

4

4 How can you arrange two magnets so they attract each other?

put opposite poles close to each other/put a north pole near a south pole

5

5 What is a magnetic field?

the space around a magnet which affects magnetic materials

6

6 How can you find the shape of a magnetic field?

use iron filings or plotting compasses

7

7 Name two electrical devices that use magnets.

any two from motors, loudspeakers, generators

8

8 Why do compasses point north?

The Earth has a magnetic field.

9

9 Describe the shape of the Earth?s magnetic field.

similar to the field of a bar magnet

10

10 Why are compass needles weighted at one end?

In most places the Earth's magnetic field is not parallel to the surface.

11

11 Which part of the Earth is responsible for the Earth?s magnetic field?

outer core

12

12 What is the difference between the Earth?s north magnetic pole and its North Pole?

The Earth spins around an axis through the North Pole; the north magnetic pole is where compasses point to.

13

13 What is an induced magnet?

something that is a magnet only because it is in the magnetic field of another magnet

14

14 Name two materials that an induced magnet could be made from.

any two from iron, cobalt, nickel, steel

15

15 You are using plotting compasses to find the shape of the magnetic field of a bar magnet. Which way does the needle point?

away from the north pole/towards the south pole

16

16 How does a magnetic field diagram show where the field is strongest?

strongest where the lines are closest together

17

17 What is a uniform magnetic field?

a field with the same strength and direction everywhere

18

18 How can you produce a uniform magnetic field?

using two flat magnets

19

19 What is the shape of the magnetic field around a wire with a current flowing through it?

circular around the wire

20

20 What is an electromagnet?

a magnet made when current flows through a coil of wire

21

21 How can you create a magnetic field around a wire?

pass a current through it

22

22 Where is the magnetic field of a wire strongest?

close to the wire

23

23 How can you increase the strength of the field around a wire?

increase the current

24

24 How can you change the direction of the field around a wire?

change the direction of the current

25

25 What is a solenoid?

a coil of wire with a current flowing through it/another name for an electromagnet

26

26 Why is an electromagnet called a temporary magnet?

It is only magnetic when a current is flowing.

27

27 Describe the magnetic field inside a solenoid.

uniform, along the centre of the coil

28

28 Why is the magnetic field of a solenoid stronger inside the coil than outside it?

The fields from the two halves of the coil reinforce each other in the middle and partially cancel each other out outside it .

29

29 Describe the magnetic field between two flat magnets.

uniform, has the same strength and direction everywhere

30

30 What is the motor effect?

a force produced when a current flows in a magnetic field