Electromagnetism

Questions

The best way to remember the information in this chapter
is to get a pen and paper and write down your answers
before clicking on the Answer link which will take you to the correct page.

You may have to read through some of the page before you find the answer.
If the answer you have written is not right, change it to the
correct answer by copying down the information from the correct page.

 

Magnet - Field - Poles - Attract - Repel
1 How many Magnetic Poles are there? Answer
2 What are the Magnetic Poles called? Answer
3 What is a Magnetic Field? Answer
4 Name one Magnetic Element. Answer
5 Draw the Shape of a Magnetic Field around a Bar Magnet. Answer
6 Which way do the Arrows in a Magnetic Field point? Answer
7 Do the Lines of Magnetic Force cross each other? Answer
8 Do Unlike Poles Attract? Answer
9 Do Like Poles Attract? Answer
10 Does the Force become Stronger as the Poles move Further Apart? Answer
11 Draw the Shape of a Magnetic Field between Poles which Attract. Answer
12 Draw the Shape of a Magnetic Field between Poles which Repel. Answer


Wire - Magnetic Field - Solenoid - Electromagnet
13 How can a Straight Wire produce a Magnetic Field? Answer
14 What is the Shape of the Magnetic Field around a Straight Wire? Answer
15 How can the Magnetic Field Direction be Reversed? Answer
16 What is a Solenoid? Answer
17 What is the Shape of the Magnetic Field around a Solenoid? Answer
18 How does Soft Iron inside a Coil make a Magnetic Field Stronger? Answer
19 What is the Difference between a Temporary and a Permanent Magnet? Answer
20 Give one Example of a use for a Permanent Magnet. Answer
21 Give two Ways of Increasing the Strength of a Magnetic Field around a Coil. Answer
22 Give one Example of a use for an Electromagnet. Answer


Bell - Relay - Circuit Breaker - Residual Current Circuit Breaker
23 Describe how an Electric Bell works. Answer
24 Give one Difference between the two Circuits of a Relay? Answer
25 What is the Advantage of using a Relay? Answer
26 Give one Example of a use for a Relay. Answer
27 What does a Circuit Breaker do? Answer
28 Describe how a Residual Current Circuit Breaker works. Answer


Motor Effect - Commutator - Loudspeaker
29 Why does a Wire carrying a Current feel a Force in a Magnetic Field? Answer
30 In which Direction is the Force? Answer
31 In a Motor, why is one side of the Armature Pushed and the other Pulled? Answer
32 What does a Split - Ring Commutator do? Answer
33 Why is a Split - Ring Commutator needed in a Motor? Answer
34 Why does the Coil in a Loudspeaker need Alternating Current? Answer
35 Why does the Paper Cone in a Loudspeaker do? Answer


Induced Current - Generator - Dynamo - Microphone
36 What is Induced Current? Answer
37 When does Induced Current happen? Answer
38 Give one Example of a use for Induced Current. Answer
39 Give two Ways of Increasing the Strength of an Induced Current. Answer
40 Give one Way of Reversing the Direction of an Induced Current. Answer
41 What does a Generator do? Answer
42 Why does a Generator produce Alternating Current? Answer
43 Why are Slip Rings needed? Answer
44 How does the Output of a Generator Change when it is turned Faster? Answer
45 Why are Slip Rings not needed in a Bicycle Dynamo? Answer
46 What makes the Magnet Rotate in a Bicycle Dynamo? Answer
47 How does Sound produce Alternating Current in a Microphone? Answer


Transformers - National Grid
48 What is a Transformer made from? Answer
49 What can a Transformer do? Answer
50 What is a Step Up Transformer? Answer
51 Which Coil has More Turns of Wire in a Step Up Transformer? Answer
52 What is the Transformer Equation? Answer
53 Will a Transformer work with Alternating Current? Answer
54 Will a Transformer work with Direct Current? Answer
55 As the Voltage goes Up, What goes Down? Answer
56 Why is Power Output less than Power Input for a Transformer? Answer
57 What is the National Grid? Answer
58 Why is Aluminium used for Cables Suspended from Pylons? Answer
59 Give one Advantage for using Pylons? Answer
60 Give one Disadvantage for using Pylons? Answer
61 Why is a Step Up Transformer used at a Power Station? Answer


Power Stations - Renewable - Non-Renewable
62 What does a Power Station do? Answer
63 What does Renewable mean? Answer
64 What does Non-Renewable mean? Answer
65 What is a Turbine? Answer
66 How do Fossil Fuels turn a Turbine? Answer
67 To what is a Turbine connected to produce Electricity? Answer
68 What is the Original Source of the Energy in Fossil Fuels? Answer
69 Give two Advantages of using Fossil Fuels to produce Electricity. Answer
70 Give two Disadvantages of using Fossil Fuels to produce Electricity. Answer
71 How does Nuclear Power turn a Turbine? Answer
72 Give two Advantages of Nuclear Power. Answer
73 Give two Disadvantages of Nuclear Power. Answer
74 How does Hydroelectric Power turn a Turbine? Answer
75 What is the Original Source of the Energy in Hydroelectric Power? Answer
76 Give two Advantages of Hydroelectric Power. Answer
77 Give one Disadvantage of Hydroelectric Power. Answer
78 How does Tidal Power produce Electricity? Answer
79 What is the Original Source of the Energy in Tidal Power? Answer
80 Give two Advantages of Tidal Power. Answer
81 Give one Disadvantage of Tidal Power. Answer
82 How does Wave Power produce Electricity? Answer
83 What is the Original Source of the Energy in Wave Power? Answer
84 Give one Advantage of Wave Power. Answer
85 Give one Disadvantage of Wave Power. Answer
86 How does Wind Power produce Electricity? Answer
87 What is the Original Source of the Energy in Wind Power? Answer
88 Give one Advantage of Wind Power. Answer
89 Give one Disadvantage of Wind Power. Answer
90 How does Solar Power produce Electricity? Answer
91 What is the Original Source of the Energy in Solar Power? Answer
92 Give one Advantage of Solar Power. Answer
93 Give one Disadvantage of Solar Power. Answer
94 How does Geothermal Power produce Electricity? Answer
95 What is the Original Source of the Energy in Geothermal Power? Answer
96 Give one Advantage of Geothermal Power. Answer
97 Give one Disadvantage of Geothermal Power. Answer
98 How does Biomass produce Electricity? Answer
99 What is the Original Source of the Energy in Biomass? Answer
100 Give one Advantage of using Biomass to produce Electricity. Answer
101 Give one Disadvantage of using Biomass to produce Electricity. Answer
102 How does The Sun make the Wind Blow? Answer
103 How does The Sun make Water Waves? Answer
104 How does The Sun make the Rain Fall? Answer
105 How can we Reduce Energy Use? Answer

 

back         Headings         Electromagnetism         Search         next

gcsescience.com              Contents             Index              Quizzes             gcsescience.com

Copyright © 2011 Dr. Colin France. All Rights Reserved.