Electromagnetism

As electrons move, they make

• A. electromagnetism.
• B. auroras.
• C. ferromagnetism.
• D. magnetic fields.

Which of the following are two kinds of magnets?

• A. atoms, domains
• B. magnetic fields, magnetic poles
• C. ferromagnets, electromagnets
• D. magnesia magnets, magnetite magnets

What kind of magnet can be turned on and off?

• refrigerator magnet
• electromagnet
• magnetite
• iron

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

• brighter
• stronger
• weaker
• invisible

This picture best illustrates the construction of a(n)

• magnet

• electromagnet

• series circuit

• parallel circuit

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

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.

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.

What is magnetic force?

• A force exerted by electrically charged particles

• A force exerted by magnets that can be felt by objects near a magnet

• A force exerted by magnets that makes an object become electrically charged

• A force exerted by a magnet only when it physically touches an object

The picture above is an example of what?

• Magnetic field

• Electric field

• Repulsion

• Attraction