8th grade 2.2 Quiz

Electric field is defined as force per charge. It is measured in units of newtons divided by __________.

• watts

• coulombs

• mass

• grams

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How does the shape of a stronger magnet’s field differ from the field of a weaker magnet?There is no difference.

• There is no difference.

• The weaker magnet has shorter field lines.

• The field lines of the stronger magnet spread out more.

• The field lines of the stronger magnet are closer together.

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Loren places two bar magnets on a table. She slowly slides one magnet closer to the second magnet. Eventually, the second magnet begins to move away from the first. What can she conclude about the repulsive force between the magnets?

• The force increases with increasing distance between the magnets.

• The force increases with decreasing distance between the magnets.

• The force is unaffected by the distance between the magnets.

• There is no force between the magnets.

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What will happen if you increase the electric current that is flowing through an electromagnet?

• The magnet will become weaker.

• The poles of the magnet will reverse.

• The magnet will become stronger.

• The magnet will become permanent.

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Which of the following procedures would increase the amount of electricity that is produced in a generator?

• Add more coils of wire.

• Spin the magnet more slowly.

• Use a weaker magnet.

• Reduce the number of coils of wire.

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When an electric current flows through a wire:

• a gravitational field is created around the wire.

• the wire becomes very cold.

• the wire begins to spin.

• a magnetic field is created around the wire.

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Which statement is true about magnetic poles?

• Like poles attract.

• Like poles aren't possible.

• Opposite poles repel.

• Opposite poles attract.

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If you bring the north pole of one magnet near the north pole of another magnet, the magnets will:

• not interact with each other.

• repel each other.

• heat up.

• be attracted together.

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In the equation for electric field strength, force is divided by __________.

• power

• charge

• current

• pulse

Which of the following is true about the relationship between electricity and magnetism?

• Electricity can be used to create a magnet.

• Magnetism and electricity cannot be converted into one another.

• Magnetism is based on how gravity attracts electrical energy.

• Electrical energy and magnetism cancel each other out.

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