0
Magnetism
Magnetism is simply an abstraction that people use for the changes in electromagnetic force created by the motion of electric charges. There are different types of magnetism that include electromagnetism, ferromagnetism, paramagnetism, and diamagnetism. To learn more and share your knowledge of magnetism and its types, ask and answer questions here.
4,020 Questions
What happens when you move two opposite magnetic poles closer together?
When two opposite magnetic poles are brought closer together, they attract each other and this force increases as the distance between them decreases. The magnetic field lines between the poles become more concentrated and stronger, resulting in a stronger attractive force. If the poles are brought close enough together, they will eventually snap together due to the strong attraction.
What is the real test for magnetism?
The real test for magnetism is to see if a material can attract other materials like iron or steel. This can be done by bringing a magnet close to the material and observing if there is an attraction or repulsion. Alternatively, one can use a compass to see if the material can influence its direction.
Is a big magnet stronger than a smaller one?
Yes a bigger magnet wil be stronger that a smaller m agnet becasue ut has more mass than that of a smaller one, therefor more electrons and more attraction.
This is not always true, some super magnets are tiny - do some research
Rutherfordium is predicted to be paramagnetic, meaning it may exhibit weak magnetic properties due to its unpaired electrons. However, experimental data on its magnetic properties is limited due to its short half-life and difficulty in producing significant quantities of the element for study.
What is a properties and interactions of magnets?
Magnets have two poles, North and South, which exert attractive or repulsive forces on each other. They create magnetic fields around them, which can attract or repel other magnets or magnetic materials. Magnets can also interact with electric currents, producing electromagnetism.
One Contributors Opinion
In 2012 the next polar reversal will take place on earth. This means that the North Pole will be changed into the South Pole. Scientifically this can only be explained by the fact that the earth will start rotating in the opposite direction, together with a huge disaster of unknown proportions.
Is the horizontal component of earths magnetic field of induction equal at all places?
No, the horizontal component of Earth's magnetic field is not equal at all places. It varies depending on the location and can be influenced by factors such as latitude, longitude, and local geological features.
Why were magnets called lodestones back then?
Lodestone is a Middle English word meaning "Course Stone" or "Guiding Stone".
Lodestone is a naturally occurring piece of magnetite, which is magnetic. If you suspend a piece of magnetite on a string it will behave as a compass, pointing north and south. Magnetite was used for navigation in this way, hence it's old name.
Why don't we use permanent magnets in electric bell?
Permanent magnets do not provide the flexibility to control the strength of the magnetic field, which is essential for regulating the vibration of the armature in an electric bell. Electromagnets, on the other hand, allow for the magnetic field strength to be easily adjusted by varying the current flowing through the wire, enabling precise control over the bell's operation.
Can a magnet pass through water?
The magnet should be able to extract iron out of water as water and iron are not chemically combined. If the water and iron would have chemically combined then it would be futile to separate them using a magnet. Note that the stronger the magnet the more iron will be removed from water.
Does magnetic force decrease as distance from the magnet increases?
Yes, the strength of the magnetic force decreases as the distance from the magnet increases. This decrease follows an inverse square law, similar to the gravitational force, meaning that the force is inversely proportional to the square of the distance between the magnet and the object.
Can soil or dirt stick on a magnet?
Iron and other magnetic minerals are some of the most common elements on the planet. Soil and oil that contain these will leave a residue of them behind on a magnet.
I'm not sure of a particular store that carries these, but I have seen them in the gift shop at our local Science and History Museum. Perhaps you might find somewhere along those lines...
Find the balls from Buckyballscube.com
No, bauxite does not exhibit magnetic properties. Bauxite is an aluminum ore and its composition does not include any magnetic elements such as iron, which is necessary for a material to be magnetic.
What is a metal that can attract other materials without touching them?
Iron, Nickel and cobalt are attracted to magnets, these are field forces because they act on an object without touching it
How do you calculate magnetic flux density?
'Magnetic field strength' (symbol: H) is defined as 'the magnetomotive force, per unit length, of a magnetic circuit'. In SI, it is expressed in amperes per metre (A/m), which is often spoken as "'ampere turns' per metre".
It's equation is: H = (IN) / l
where:
H = magnetic field strength (ampere per metre)
I = current flowing through coil (amperes)
N = number of turns in coil
l = length of magnetic circuit
What side of the magnet repels and attracts?
well when you have two magnets that are the same direction, for example, noth and north, they repel because they are both north but when you have north and south they attract because they are different sort of like man and woman
When magnetic flux through surface is maximum?
Magnetic flux through a surface is maximum when the direction of the magnetic field is in the same direction as the normal vector of the surface. In other words, the magnetic flux is maximum when the magnetic field is perpendicular to the surface area. That's why φ=BAcosθ, where θ is the angle between the direction of the magnetic field and the normal vector of the surface area. When the magnetic field is exactly the same direction as the normal vector (aka the magnetic field is perpendicular to the surface), θ=0 and cosθ = 1, its maximum value. The closer θ is to 90 degrees (ie. the more parallel the direction of the magnetic field is to the surface area, or the less parallel the magnetic field is to the surfaces normal vector), the smaller cosθ is, and thus flux will decrease accordingly.
How can a magnet attract a piece of iron that is not magnet?
When a magnet is brought close to a piece of iron, the magnetic field of the magnet causes the atoms within the iron to temporarily align in the same direction as the magnetic field. This alignment creates a magnetic field within the iron, which then interacts with the magnetic field of the magnet, causing attraction between the two. The iron itself does not become permanently magnetized, it just responds to the external magnetic field of the magnet.
Why do magnetic lines of forces prefer to pass through iron than air?
Magnetic lines of force prefer to pass through iron rather than air because iron is a ferromagnetic material, which means it can easily be magnetized and has a high permeability compared to air. This results in a stronger magnetic field within the iron, making it easier for the magnetic lines of force to pass through.
WHICH IS MORE POWERFUL GRAVITY OR MAGNETISM?
Well, let's see. If I have a paper clip on a table and a magnet in my hand, and
I slowly pass the magnet over the paper clip, the magnet in my hand is pulling
the paper clip up with magnetism. If my magnet is close enough to the paper
clip, the paper clip will jump up to the magnet ... even though the whole Earth
is pulling it down with gravity.
How can you determine the poles of an odd shaped magnet?
You place the magnet under a piece of paper, and then sprinkle some iron filings on the paper. The iron filings will line up along the magnetic lines of force, which will show very clearly where the magnetic poles are.
Can magnetic fields harm the body?
No. Look at the MRI, which generates enormous magnetic fields. It does not hurt the body. Even if you look at the iron in the blood, that iron is not ferromagnetic because it is distributed extremely finely, and iron needs to be in bulk form to be ferromagnetic.
Another Answer:
Sometimes. Large rapidly oscillating magnetic fields can cause extensive bodily damage. This damage is exactly similar to electromagnetic radiation damage received by exposure to gamma, x, and ultra violet radiation. Simply put magnetic fields by themselves are relatively harmless, but when used to induce electrical currents or chemical reactions, they can be moderately dangerous.
As with practically everything, magnetic fields do have the potential to harm the human body, but it depends on the degree.
Consider the extreme example: All materials have the property known as diamagnetism, which is basically caused by atoms creating a repulsive magnetic field to oppose an external magnetic field. Given a strong enough external magnetic field, this effect could rip apart the atoms in the body. This situation is unrealistic, but an example of a harmful effect nonetheless.
As far as reality is concerned, there is an ongoing debate about whether magnetic fields can be harmful. There is evidence, but it's hardly conclusive. To learn all about the claims, evidence, studies, and conclusions, see the related link below.
Why does magnetic flux not pass through the hole in the washer?
This question refers to the phenomena of making a washer rise when it is in a superconducting state. This is a popular science demonstration experiment.
Normal superconductors will not allow the penetration of a magnetic field into its interior. This is accomplished by creating a current distribution on the surface that is arranged to exactly cancel the externally created field in the interior of the superconductor.
The induced current is an electromagnet and has an external magnetic field. As with any magnet, there is a force then between the electromagnet and the external magnetic field source. They repel and the washer moves.
