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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
How long do cheap magnets last compared to more expensive ones?
A permanent magnet will retain its magnetism unless it is affected by a strong outside magnetic or electrical force, or elevated temperatures. If they are not exposed to any of these conditions, permanent magnets will lose magnetism on their own, however this degradation is very slow, on the order of one percentage point every ten years or so.
The north and south poles are each at 90 degrees north and south, respectively. These terrestrial poles are points on the earth where the earth's rotational axis meet the earth's surface. Both the north and south poles are near their magnetic poles, defined as moving points of polar magnetism.
Additionally, there exists a complex notion known as the geomagnetic poles, both north and south.
In the arena of extreme exploration, mountaineers defined a third geographical location: Mt Everest, as a 'pole'.
Are electricity and magnetism the same thing?
Electricity and magnetism are similar but yet different. They are both able to make a form of each other. If electricity charges are pulled at a great force they will be able to create a type of magnetic force. Magnets are able to produce forms of electricity when their pulls are changed.
How can one build a magnetic notice board?
To build a magnetic notice board, start with a metal surface such as a sheet of steel or a magnetic whiteboard. Then attach magnets to the back of papers or notes you want to display. These magnets will stick to the metal surface and hold your notices in place.
How do you make a magnetic floater?
To make a magnetic floater, you will need a magnetic material like neodymium magnets, a non-magnetic floating material like cork or foam, and a container filled with a liquid like water or oil. Place the floating material on the liquid's surface and add the magnets underneath to create a magnetic field that holds the float in place. Adjust the strength and positioning of the magnets to achieve the desired floating effect.
Where can you buy kitchen magnets?
Adhesive magnets can be purchased from a variety of places. Visit the websites Amazon, AdhesiveBackedMagnets, JobMasterMagnets, Staples, and MagnetSupplier.
Why would a magnet stick to your skin?
Amagnate can stick to certain plates, If there is a plate in your body that magnates can stick to then it has to determine where in the body the plate is. If its near the skin then probably yes, but if its deeper in your body the magnate may not stick
Are repelling magnets stronger than attracting magnets?
The strength of repelling and attracting magnets depends on various factors such as their size, shape, and distance between them. In general, repelling magnets can exhibit strong forces due to the energy required to overcome their natural inclination to repel. However, the strength of attracting magnets can also be powerful depending on the magnetic properties of the materials involved.
Where can one purchase magnetic balls?
Magnetic balls can be purchased online through websites like Amazon, eBay, or specialty retailers that sell magnetic toys. It's important to verify that the product is safe and complies with relevant safety standards before making a purchase.
Why do non magnet does not exhibit magnetic property?
They do but it in the external magnetic field. In order for material to have magnetic properties without any fields it should be ferromagnetic. In paramagnetic all spins are pointed in the same direction. In diamagnetic spins are oriented randomly it vanishes the effect.
A flux field is a concept used in physics to describe the flow of a physical quantity through a surface. It can be thought of as the amount of something passing through an imaginary surface or area. In electromagnetism, for example, magnetic flux represents the amount of magnetic field passing through a given area.
Which objects have magnets in them?
Many objects have magnets in them. Electric motors and speakers use them. Refrigerator magnets and similar objects use magnets. The magnetron of a microwave oven usually contains two large magnets. Even some types of fake earrings use magnets.
How do household goods use magnets?
Household goods can use magnets for various purposes, such as in refrigerator magnets for displaying notes or in magnetic clips to hold items together. Magnets can also be found in speakers to produce sound and in magnetic door latches. Additionally, magnetic strips are used in credit cards, security sensors, and magnetic knife holders in kitchens.
How is light related to electricity and magnetism?
Light is an electromagnetic wave, consisting of oscillating electric and magnetic fields. This connection is described by Maxwell's equations in electromagnetism, which show how changes in electric fields can induce magnetic fields, and vice versa. This relationship is fundamental to understanding how light interacts with matter and how electricity and magnetism are interconnected phenomena.
Can magnets attract a copper wire?
No, copper is not magnetic.
That said, if the copper wire has an electric current flowing through it then it will generate its own magnetic field around the wire. It seems feasible that this could be enough to move the wire if you have another magnet near it.
What is a magnetic field will be produced at some point in space if the electric field at the point?
As far as the electric field is stationary then no magnetic field. But when electric field is moving at a uniform speed then a magnetic field will be produced. This is what we call Lorentz magnetic field.
What part of the magnetic field is strongest and what part is the weakest?
The magnetic field is strongest at the poles of a magnet, where the magnetic field lines are most concentrated and closely packed. The magnetic field is weakest in the areas between the poles, known as the equator of the magnet.
Magnets are made by aligning the magnetic domains of a material, such as iron or neodymium, through processes like heating or using strong magnetic fields. This alignment of domains creates a magnetic field in the material, giving it its magnetic properties.
Is the earth slightly bulged at the poles?
Yes, the Earth is slightly bulged at the poles and flattened at the equator due to its rotation. This shape is known as an oblate spheroid. The polar diameter is shorter than the equatorial diameter by about 43 kilometers.
Which device uses a rotating electric power source to produce a magnetic field?
well as the name mention production of magnetic field due to rotation. if we consider three identical coils axis physically by120* each and 3 phase supply given then their is the production of aleternating magentic field in each coil
How opposite charges or poles respond?
Opposite charges or poles attract each other due to the presence of a potential energy that decreases as the charges move closer together. This attraction is governed by Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Why does earth have a south pole and north pole and what are they?
The actual north and south pole (not the magnetic north and south poles) represent the points on the Earth's surface connecting the imaginary line, or axis, around which it rotates. If you spin a top or a ball horizontally, the ball could be said to have a north (top) and south pole (bottom) on its axis.
The Earth has a north and south pole because the Earth spins about an axis. The Earth spins because of how the Earth was formed. A bunch of planetesimals, gas and other debris were attracted to one another by gravity, then spiraled in toward each other. A similar effect is what causes rotation in hurricanes, as the low pressure draws in moisture in a massive, spinning storm.
The spinning of the earth is what causes the Sun to appear to rise and set. It is not the Sun that is actually moving to rise and set, but rather the surface of the Earth turning beneath it. When looking up from a point on the surface of the Earth, the Sun appears to rise in the east and set in the west.
If you stood at the North or South Pole, you would be turning in a circle rather than moving laterally. Conversely, at the equator you would be moving eastward at about 1674 kilometers per hour (1040 mph).
What is the best term that describes the space surrounding a magnet in which the magnet force acts?
The best term to describe the space surrounding a magnet in which the magnet force acts is "magnetic field." The magnetic field is a region around a magnet where magnetic forces are exerted on other magnets or magnetic materials.
Is the magnetic pole near the Earths true North Pole a magnetic south pole or a magnetic north pole?
Earths geographic North Pole is also currently a magnetic north pole. This is however not always the case because over geological time scales the Earth's magnetic poles flip as a result of changes of flow in Earth's molten core which produces Earth's magnetic field.
