Magnetic substances can be used to make __________ magnets by rubbing them against a magnet in one direction.

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Solution

Substances that show magnetic character and produce a magnetic field are called magnetic substances.
When a magnet is rubbed against an object, then it produces magnetic field lines in that object.
These magnetic field lines are lined up in one direction and hence the object becomes magnetized.
This produces a strong magnetic field.
Hence, Magnetic substances can be used to make strong magnets by rubbing them against a magnet in one direction.

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