Electromagnetism

This picture best illustrates the construction of a(n)

• magnet

• electromagnet

• series circuit

• parallel circuit

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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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What is true about electricity and magnetic fields?

• Electricity is needed to create any magnet.
• Electricity always creates a magnetic field.
• Electricity is stronger than a magnetic field.
• Electricity prevents magnetic fields from occurring.

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This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

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What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

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Which of the following is not a good conductor?

• Copper

• Silver

• Aluminium

• Plastic

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If you wrap more coils around an electromagnet, it will become 

• brighter
• stronger
• weaker
• invisible

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What is the flow of electricity?

• electric motor
• Electric current
• Electric eel
• electric circuit

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a magnetic crane picks up pieces of metal in the picture. the crane magnet is made by electrified current and a coil. Most likely, what element is the metal?

• copper

• steel

• aluminum

• iron

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These magnetic domains are:

• strongly magnetized

• slightly magnetized

• unmagnetized

• not enough information to tell