Electric and Magnetic Forces Concepts

As the amount of charge on either of two charged objects INCREASES, the electric force between the objects DECREASES

• True

• False

Two objects will experience an electric force of attraction when they have ___.

• like charges

• opposite charges

• the same amount of charge

• no charge

Which system best illustrates attractive forces?

• X, because the magnetic field lines connect to each other.

• Y, because the magnetic field lines repel each other.

• X, because the magnetic field lines repel each other.

• Y, because the magnetic field lines connect to each other.

Which system would need an external force to move the magnets closer together?

• X, because the magnets are attracting.

• Y, because the magnets are repelling.

• X, because the magnets are repelling

• Y, because the magnets are attracting.

In which system could you increase the magnetic potential energy by pushing the two magnets closer together?

• X, because the magnets are attracting.

• Y, because the magnets are repelling.

• X, because the magnets are repelling

• Y, because the magnets are attracting.

The magnetic domains of a permanent magnet are arranged randomly.

• True

• False

Because of the magnetic field, magnets do have to touch to affect each other.

• True

• False

When an object that is made of magnetic material but is not a magnet comes in contact with a magnet __________.

• its magnetic domains fall into alignment and it begins to repel other objects made of magnetic material.

• its magnetic domains fall into alignment and it begins to attract other objects made of magnetic material.

• its magnetic domains fall out of alignment and it begins to repel other objects made of magnetic material.

• its magnetic domains fall out of alignment and it begins to attract other objects made of magnetic material.

How can you make an item that is made of magnetic material become a permanent magnet instead of a temporary magnet?

• You can leave it in the magnetic field of an actual magnet for a long time.

• You can heat it while it is being influenced by a magnetic field.

• You can heat it and then let it cool in a very strong magnetic field.

• You can do any of these things.

The location of the strongest magnetic field is the _____.

• center of the magnet

• magnetic domains

• magnetic fields

• magnetic poles