magnetism

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.

The ability of some materials to attract certain metals is called

• Electricity
• Magnetism
• Electromagnetism
• Atoms

If the north pole of a magnet is brought close to the south pole of another magnet, what will happen?

• They will atrract each other

• They will repel each other

• They will demagnitize

• The south pole will turn around so the north pole is facing the other magnet.

What does this image show?

• Parallel circuit

• Series circuit

• Magnet

• Electromagnet

As the strength of a magnetic field increases, the ability to attract metal objects ____________.

• increases

• decreases

• stays the same

A magnet will pick up an object that is made of...

• plastic

• iron or steel

• glass

• copper