Electricity and Magnetism

The picture shows six objects. Each object is hanging from a string. Three of the objects have a positive charge and three have a negative charge.

• Like charges pull on each other.

• Opposite charges push each other apart.

• Opposite charges and like charges pull on each other.

• Opposite charges pull on each other, but like charges push each other apart.

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What will happen when the objects are slowly moved toward each other?

• They will attract each other.

• They will push away from each other.

• They will not interact with each other.

• They will both move in the same direction.

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What will happen between these two magnets?

• The south pole of Magnet 1 will move toward the north pole of Magnet 2.

• The south pole of Magnet 1 will push the north pole of Magnet 2 away.

• The outside poles will become the same as the inside poles.

• The outside poles will lose their magnetic properties.

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Why did the magnets stick together in the way shown?

• The north pole of a magnet pulls on the north pole of other magnets.

• The north pole of a magnet pulls on the south pole of other magnets.

• The south pole of a magnet pushes away from the north pole of other magnets.

• The north pole of a magnet pushes away from the south pole of other magnets.

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If the same poles of two magnets are brought near each other, which result is most likely?

• They will repel.

• They will attract.

• They will explode

• They will do nothing

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Which charges will attract each other?

• opposite charges

• like charges

• all charges

• no charges

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How could a student use a magnet to determine whether a rock sample contains a high amount of iron?

• by observing whether the magnet and rock release light

• by observing whether the magnet and rock change their colors

• by observing whether the rock becomes warm near the magnet

• by observing whether the rock moves as it is approached by the

  magnet

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A magnet is placed the same distance away from four objects made from different materials. Which object would a magnet pull?

• aluminum can

• copper pipe

• an iron nail

• a glass bowl

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What will cause two magnets to repel each other?

• placing the opposite poles together

• placing them in a glass of water

• placing them in a bucket of soil

• placing the like poles together

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Which is an example of static electricity?

• hair standing up when a balloon is rubbed on it

• a train using a magnetic force to go forward

• a circuit that turns on a lamp light

• putting a magnet on a refrigerator door

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