When seawater is exposed to sunlight and air, the water evaporates completely, leaving behind a solid mixture that contains salts, including common salt. Class 6 Science NCERT Chapter 9
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When you cut a magnet in half, each piece becomes a new magnet with its own north and south poles. This occurs because the magnetic domains realign, ensuring that both pieces have opposite poles.
The law of magnetic poles states that like poles repel and unlike poles attract. This means that a north pole will attract a south pole but repel another north pole, and vice versa.
Magnetic poles are the regions at the ends of a magnet where the magnetic force is strongest. Every magnet has two poles: a north pole and a south pole, which are responsible for magnetic interactions.
A magnetic field can be visualized using iron filings or a compass. Iron filings sprinkled around a magnet align along the field lines, while a compass needle aligns itself with the magnetic field direction.