Which of the following statements are true? aMagnets need to be touching an object to exert a magnetic force on the object. bDecreasing the distance between an object and a magnet increases the magnetic force. cIncreasing the distance between an object and a magnet increases the magnetic force. dThe magnetic force begins at a certain distance and then stays constant. eAll statements are true.
Question
Which of the following statements are true? aMagnets need to be touching an object to exert a magnetic force on the object. bDecreasing the distance between an object and a magnet increases the magnetic force. cIncreasing the distance between an object and a magnet increases the magnetic force. dThe magnetic force begins at a certain distance and then stays constant. eAll statements are true.
Solution
The correct statements are:
b) Decreasing the distance between an object and a magnet increases the magnetic force. This is true because the closer objects are to a magnet, the stronger the magnetic force they experience.
The other statements are not true:
a) Magnets do not need to be touching an object to exert a magnetic force on the object. Magnetic forces can act at a distance.
c) Increasing the distance between an object and a magnet decreases the magnetic force, not increases it. The further away objects are from a magnet, the weaker the magnetic force they experience.
d) The magnetic force does not begin at a certain distance and then stay constant. It varies with distance, getting weaker as the distance increases.
e) All statements are not true, as explained above.
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