It’s impossible to obtain a magnet with a single pole because every magnet has both a north and south pole. Cutting a magnet always results in two smaller magnets, each with its own north and south poles.
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Yes, you can use a magnet to pick up a steel paper clip from water without wetting your fingers or the magnet. By holding the magnet outside the water, it will attract the paper clip through the water’s surface.
Magnetic field lines represent the direction and strength of the magnetic field. They show how the magnetic force acts around a magnet.
A magnetic field can be visualized using iron filings, which align along the field lines around a magnet when sprinkled on a sheet of paper.
In ancient times, travelers and sailors used a magnetic compass to determine direction. This instrument, utilizing a magnetized needle, aligns with Earth’s magnetic field to show the north-south direction, aiding navigation.