EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Their magnetic fields are not strong.
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They have the same poles.
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They have opposite poles.
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They have no iron in them.
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Detailed explanation-1: -A magnet sticks to your refrigerator. What does this tell you about the magnetic fields of the fridge and the magnet? Their magnetic fields are not strong.
Detailed explanation-2: -Ferromagnetism is what causes everyday refrigerator magnets to stick to things solidly. Stainless steels that are ferromagnetic allow magnets to stick to them firmly.
Detailed explanation-3: -Unlike most conventional magnets that have distinct north and south poles, flat refrigerator magnets are magnetized during manufacture with alternating north and south poles on the refrigerator side.
Detailed explanation-4: -According to the National High Magnetic Field Laboratory of Florida State University, a fridge magnet is about 0.001 tesla. To put that in perspective, the Earth’s magnetic field is about 0.00005 tesla and an average MRI magnet measures 1.5 tesla.
Detailed explanation-5: -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.