SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bar magnets have only one magnetic pole.
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The magnetic force is strongest at the poles.
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Bar magnets attract iron.
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The S poles of two bar magnets will repel each other.
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Detailed explanation-1: -Answer: Solution: (i) False; A magnet of any shape always has two poles: a north pole and south pole. (ii) False; Natural magnets were discovered in Greece.
Detailed explanation-2: -Magnetic field are always north to south inside the magnet, this statement is not true.
Detailed explanation-3: -For a bar magnet, it always attracts iron and steel particles. While its like poles repel each other, unlike poles attract each other. When freely suspended, north pole of magnet points towards north pole of the earth.
Detailed explanation-4: -(i) A cylindrical magnet has only one pole. (ii) Artificial magnets were discovered in Greece. (iii) Similar poles of a magnet repel each other. (iv) Maximum iron filings stick in the middle of a bar magnet when it is bought near them.
Detailed explanation-5: -All magnets have exactly two poles-a north and a south. Some scientists theorize that a magnet with one pole called a monopole is possible, but the feat has yet to be achieved. In fact, if you were to take a bar magnet and cut it in half, the two pieces would separate and form new sets of poles.