EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When a bar magnet is cut in half, each half has a north and south pole.
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The north pole of a compass needle is attracted to the south pole of a bar magnet.
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When an electric current flows through a wire, a magnetic field forms around the wire.
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The strength of a horseshoe magnet’s magnetic field decreases as the magnet is pulled away from another object.
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Detailed explanation-1: -The correct answer is B. When a bar magnet is cut in half, each half has a north pole and a south pole. So, Candice learned that every magnet has two magnetic poles. This means that when you cut a whole magnet into two parts, you will get two new magnets.
Detailed explanation-2: -When a bar magnet is cut into half both the halves will have a north pole and a south pole each. Magnets cannot have isolated poles. A new north pole and south pole will be formed at the edges where the bar magnet is cut as shown in the figure. So, the two halves will attract each other.
Detailed explanation-3: -If a bar magnet is cut into two pieces then each piece will have two poles. However, the strength of newly formed magnets will be lesser than the actual magnet.
Detailed explanation-4: -When opposite poles of the magnets approach, they attract each other. Any north-south combination will pull them together. But when two like poles come together, they push each other apart. Two north poles will not stick together.
Detailed explanation-5: -A magnet has two ends called poles; one end is the north pole and the other is the south pole. A north pole will attract a south pole; the magnets pull on each other.