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Self-Test 3
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There are three types of magnets: natural, artificial, and electric.
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True
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False
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Natural magnets have the strongest force.
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True
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False
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If the south poles of two magnets are brought together, what they will do?
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Conduct
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Relate
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Saturate
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Repel
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Changing which of the following will also change the strength of an electromagnet?
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Direction of current flow
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Size of wires
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The length of the core
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Amount of current flow
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What is the core of an electromagnet usually made from?
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Air
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Soft iron
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Aluminum
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Copper
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What two elements must be combined with a conductor to generate a voltage?
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Magnetic field and a current
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Current and movement
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Coil and a magnet
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Magnetic field and movement
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Magnetic lines of force never cross.
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True
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False