Magnetism Magnetic Fields

A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.

• calculator

• ruler

• compass

• map

Which type of magnet loses magnetism outside of a magnetic field?

• a strong magnet

• a temporary magnet

• a permanent magnet

• an electromagnet

Paper clips and staples are attracted to magnets because paper clips and staples are

• permanent magnets

• temporary magnets

• magnetic materials

• magnetic domains

Are the magnetic field lines in the picture correct?

• Yes, because they point from north to south.

• No, because they point from north to south (they're supposed to go the other way).

• Yes, because the North pole is on the left in all pictures.

• No, because the North pole is on the left in all pictures (it's supposed to be on the right).

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In this image, matching north poles from two magnets are introduced.  What do you predict will be the outcome?

• There will be no interaction.  The poles of magnets do not have an effect on one another.
• The two north poles will attract each other
• The two north poles will repel each other
• The two magnets will combine and become one magnet

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Why are paper clips attracted to magnets?

• They contain silver.
• They contain aluminum
• They contain tin.
• They contain iron. 

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A clumsy student drops a bar magnet and it breaks into this configuration. Afterwards, what is the result for the left and right magnets respectively?

• N-N on the left and S-S on the right

• N-S on the left and N-S on the right

• S-N on the left and S-N on the right

• S-S on the left and N-N on the right

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The strongest part of a magnet is...

• the bars .

• the force field.

• the poles.

• the middle.

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The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

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Magnetic field lines always cross.

• True
• False