Electricity and Magnetism Review

What happens when two north poles of a magnet are placed together?

• they repel
• they attract
• they cancel each other out
• the strength of the magnet is doubled

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What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

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True or False: All metals stick to magnets.

• True
• False

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Where is the force of attraction the strongest on a magnet?

• at the poles
• in the middle
• above the magnet
• below the magnet

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A magnet will attract scissors if the scissors contain: 

• copper
• aluminum
• gold
• nickel

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A device that uses a free-moving magnetic needle to show direction is a:

• Ruler

• magnet

• compass

• magnetic field

Which of the following factors influences the strength of the electromagnet?

• Shape of the coil

• Number of turns of coil

• Types of current

• Colour of the core

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The direction of magnetic field produced by a current flowing through a straight conductor can be determined by

• Left-hand grip rule

• Right-hand grip rule

• Faraday's law

• Lenz's law

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How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

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How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole

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