Download Fact sheet for Electricity and Magnetism Year 8 Lesson One

Fact sheet for Electricity and Magnetism Year 8
Lesson One Charging Up
1. Names the two types of electrical
charges
2. Which charges attract
3. Which charges repel each other?
4. What charge does a proton have?
5. What charge does an electron have?
6. What charge does a neutron have?
Lesson Two Circuits and Current
7. Give the definition of current
8. What does a switch do in a circuit?
9. What piece of equipment do you
measure current with?
10. What is the unit of current?
11. What does a battery do?
Lesson Three Potential Difference
12. Which piece of equipment do you use to
measure potential difference?
13. What is the unit of potential difference
14. Give another word for potential
difference
Lesson Four Series and Parallel
128- 129
15. Draw a simple series circuit
Kerboodle Pages 122-123
Positive and negative
Positive and negative
• Negative and negative
• Positive and positive
Positive
Negative
Neutral
Kerboodle pages 124-125
The amount of charge flowing per second
Opens and closes a gap in the circuit
An ammeter
Amps (A)
Pushes charge around a circuit
Kerboodle Pages 126-127
A voltmeter
Volts
Voltage
Kerboodle Pages
16. Draw a simple parallel circuit
17. What happens to the current in a series
It is the same everywhere
circuit?
18. What happens to the current in a parallel The current in all the branches of the circuit
circuit?
adds up to the current at the beginning and
end
19. What happens to the potential
The potential difference across the
difference in a series circuit?
components adds up to the potential
difference of the battery
20. What happens to the potential
difference in a parallel circuit
Lesson Five Resistance
21. What is resistance?
22. Whatis the unit of resistance?
23. How do you calculate potential
difference (Ohms Law)?
24. Why are metals good conductors?
25. Why is plastic an insulator
Lesson Six Magnets and Magnetic fields
26. What happens if you put two north poles
of a magnet together?
27. What happens if you put a north and a
south pole together?
28. Name four magnetic materials
29. Draw the field lines around two magnets
attracting
The potential difference across each
component is the same a the potential
difference across the battery
Kerboodle Pages 130 -131
How easy or hard it is for charge to flow
through a component
Ohms (Ω)
V=IR
Voltage = Current x Resistance
They have a low resistance as lots of
electrons can move.
They have a huge resistance as not many
electrons can move
Kerboodle Pages 132-133
They repel
They attract
Iron, steel , nickel and cobalt
30. Draw the field lines around two magnets
repelling
31. Why does a compass work?
Lesson Seven Electromagnets
32. What is special about an electromagnet?
33. Describe an electromagnet
34. How do you make an electromagnet
stronger?
Lesson Eight Using electromagnets
35. How can magnets be used on a train
36. What is a relay
37. Give two uses of electromagnets
38. How does a motor work?
The Earth is like a huge bar magnet
Kerboodle pages 134-135
It’s a magnet you can switch on and off.
It is much stronger than a normal magnet
It is a coil of wire with a core or iron or steel
• Increase the number of turns in the coil
• Increase the current
• Have a magnetic material as the core.
Kerboodle pages 136-137
Powerful magnets on the track repel
magnets on the train
A small current can turn on a much bigger
current in a separate circuit
• Starting a car
• Sorting metal
A current flows in a coil between two
permanent magnets. The coil begins to spin