Noun
magnet (magnets)- A piece of material that attracts some metals by magnetism.
- (informal, preceded by a noun) A person or thing that attracts what is denoted by the preceding noun.
- :He's always in the company of women — he's a bit of a babe magnet.
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...A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some rare earth metals and some of their alloys (e.g., Alnico), and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism. Read full entry
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Can I make a magnet that Is there such a thing as a
magnet that can attract lets
say, brass, tin, or silver? Or
do magnets only attract other
magnets? How do I create a
magnet that would attract
silver?
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Magnets do not only attract other magnets. However in terms of ordinary field strengths and degrees of attraction, they only attract things that are "ferromagnetic." For materials you are likely to have lying around, this means iron and things with a lot of iron in them, like steel. Not all steels, either. Many types of stainless steel are only very weakly attracted by magnets. Brass, tin, and silver are simply not on the list. Magnets do also interact with other materials via "paramagnetism," but this is too weak to be noticed most of the time. Brass, tin, and silver are not on that list either. Later: The Earth is not an exception. Its magnetic field is created by a sort of a natural dynamo involving its molten iron core. Without the iron in the core the Earth would have no magnetic field (as the Moon does not). Sure, gravity attracts all matter... but gravity and magnetism are not at all the same thing. |
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what and how does a magnet to I've done an experiment where
i placed a magnet under a bean
while it grew. The bean with
the magnet grew larger
compared to the bean without a
magnet, but I don't know why
the magnet affected the bean
the way it did. I tried to
look up answers but i didn't
understand any of them! I need
something simple like "the
magnet attracts nutrients to
make the plant bigger" please
help!
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I suggest there is no evidence that a magnet effects a plant in any way. I suppose you can find weird instances where cert5aqin magnetic poisonw were taken away from the plant, but plands are not magnetic, and not affected them. |
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What type of magnet do we use In my opinion,we can't use
electromagnet to induce
current as we can't use
current (to make
electromagnet) to generate
current.
But the permanent magnet isn't
strong enough to supply the
current efficiently.
So, what type of magnet do we
use in generators?Are they
permanent magnet in which we
induce current to make it more
efficient?
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yeah, it is a permanent magnet, but you have to remember, if it's in petrol generator or something along those lines that can spin it past the wires at 3000 rpm+, it's still going to generate a lot of electricity, and you can get very strong permanent magnets.... |
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