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
Why a stationary charge do not feel any force in magnetic field?
we know that force on a charge in magnetic field
F=qvbsinx
q-charge
v-velocity
b-strenth 0f magnetic field
x-angle between the motion of chage and the magnetic field
as the charge is stationary so v=0
so,F=0
so charge donot fill any force on it.
Many rocks have magnetic properties (are capable of being magnetized, are magnetic or are attracted by a magnet) derived from magnetic minerals in their composition like magnetite, hematite, and ilmenite. The most well known magnetic rock is the lodestone, which is comprised mainly of magnetite.
How is earth and a bar magnet similar?
The Earth is similar to a bar magnet because a magnet holds other magnets or metal objects to it. The same concept goes for the Earth. Gravity from Earth holds all objects down unless another force acts upon it.
What did Faraday discover about magnets?
Michael Farady is best known for his work in the field of electricity and magnetism. He discovered the effect of magnetism on light, discovered and named Diamagnetism, the behavior of substances in magnetic fields and he was the first to produce an electric current from
How magnets and electromagnets make a can sorter work?
Magnets will pick up steel cans, lifting them away from a solid waste stream. Additionally, rapidly changing magnetic fields can be used to "pop" other metals out of a solid waste stream, through current induced in those metals.
What is the thing that weakens a magnet?
Magnets are "demagnetized" by extreme heat. If you boil a magnet in water, the heat will demagnetize the magnet.
What material is suitable for a bar magnet?
Bar magnets are typically made of ferromagnetic materials such as iron, nickel, or cobalt. These materials have the ability to retain a magnetic field when magnetized, making them ideal for creating strong and long-lasting magnets.
How magnetism can be useful for identifying minerals?
Magnetism can be useful for identifying minerals because certain minerals exhibit magnetic properties due to the presence of magnetic elements like iron or nickel. By observing a mineral's response to a magnet, geologists can infer its composition and potentially identify it. This can help in mineral exploration and resource assessment.
Does magnetism affect gravity?
No. They are very different.
Here are a few differences:
-- Gravity creates a force between every two objects. Magnetism only acts between objects made of certain substances that are 'magnetic'.
-- Gravity can only attract objects toward each other. Magnetic force can pull objects together and can also push objects apart.
-- Magnetic force can be created by an electric current flowing through a wire. Gravitational force can't be created in any way that we know of; it simply exists in the space around any mass.
-- You can take a magnet and make it a non-magnet, by heating it or hitting it with a hammer. But there is no way to make a mass stop exerting gravitational force on other masses.
-- You can shield yourself from magnetism by wrapping yourself in appropriate substances, (like aluminum foil for example). But there is no shield that blocks gravity out.
When a magnet splits why does the polarity change?
The polarity of a magnet does not change if the magnet is cut into pieces. Each piece has the same polarity that it had before.
In particular, if you break a bar magnet in half at the midline between the two poles, you will end up with two magnets N-S and N-S. No reversal of polarity occurs.
What three things needed to complete magnetic induction?
- A changing magnetic field
- A conductor or coil of wire
- Movement between the magnetic field and the conductor (relative motion)
Is it safe to rub magnets on Mormons?
Sure. Members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) are human just like anyone else, and it isn't extremely harmful to rub a magnet over human skin. If you have iron rich blood or a pacemaker and are exposed to extremely strong magnets for long periods of time, it can cause problems, but just rubbing a normal refrigerator magnet on your skin wont do anything.
No, iron is not a permanent magnet. It can be magnetized in the presence of a magnetic field but will lose its magnetism once the external magnetic field is removed. Permanent magnets, on the other hand, retain their magnetism without the need for an external magnetic field.
Do North poles attract North poles?
No, North poles repel each other due to their magnetic properties. Like poles (North-North or South-South) will push away from each other, while opposite poles (North-South or South-North) will attract each other.
Uhhh... sure? There are nearly 14 million members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) around the world. Most of them use magnets. Some of them probably collect magnets. The Church and it's members have no beliefs or doctrines about magnets.
What type of magnetic poles do the domains at the north pole of a magnet have?
The domains at the north pole of a magnet have their magnetic poles pointing outward, creating a magnetic field that attracts the south pole of other magnets. Each domain has its magnetic north pole facing outward at the surface of the magnet.
What do magnets attract that electromagnets do not?
Magnets attract magnetic materials like iron, nickel, and cobalt. Electromagnets, on the other hand, can attract or repel any material that responds to a magnetic field, as they can be turned on/off by controlling the electric current flowing through them.
Will a magnet stick to galvanized steel?
Yes, a magnet will stick to galvanized steel. Galvanized steel is steel that has been dipped in molten zinc so it comes out with a zinc coating. (The zinc coating inhibits corrosion.) A magnetic can "reach through" this coating and stick to the steel.
How do scientists make new discoveries in magnetism?
Scientists often make new discoveries in magnetism by conducting experiments, analyzing data, and developing theories to explain magnetic phenomena. They may use advanced technologies like magnetic field sensors, electron microscopes, and computer simulations to study the behavior of magnetic materials at the atomic and molecular levels. Collaboration with other researchers and interdisciplinary approaches also play a crucial role in advancing our understanding of magnetism.
Does the earth act like a big bar magnet?
The earth acts as a sort of magnet. The gravity is like a + and we are - but neither of us have any charge, unlike magnets. The gravity has a downward force on mass (which is always constant) and gives us 'weight'. Weight is not a constant and changes as gravity increases or decreases. Magnets do not effect weight.
Wooden core electromagnet vs iron core electromagnet?
A coil of wire or a coil in the shape of a cylinder is a typical shape for an electromagnet. The strength of the magnetic field of an electromagnet can be increased significantly if the coil is wrapped around an iron core. This does not happen with nonmagnetic materials such as wood or aluminum or rubber.
The enhancement of the electromagnet is caused by the magnetic properties of iron. The atoms of iron have magnetic properties as a consequence of thier electronic structure. (The cause of magnetism at the atomic level is a complex issue if described in detail and that complexity is beyond this explanation.) In a simplified picture one can say that at the atomic level the iron atoms act like little magnets.
The magnetic characteristics of iron are such that an external magnetic field causes the rearrangement of the electronic structure of the iron at the atomic level and that creates a magnetization in the iron. That magnetizations has its own magnetic field just like a normal permanent magnet. The field created by the magnetization of the material adds to the external field and one gets a stronger magnetic field in and around the iron core.
Why do diamagnetic materials align perpendicular to an external magnetic field?
Just to minimize the force of repulsion on it. Actually the dipoles get aligned exactly opposite to the external field. So opposition comes into the scene. If the object is along the field then the repulsion would be more and if it gets aligned in perpendicular then its thickness alone is opposing thereby the repulsion gets minimized.
The modern term Hertz refers to a unit of frequency measurement, symbolized as Hz, named after the German physicist Heinrich Hertz. It is commonly used to measure the number of times a wave cycles per second, such as in radio waves and electrical currents.
How can you use a ferrofluid to create electricity?
Hi there I've just incountered some helpful guides on making ferrofluid: http://www.instructables.com/id/Make-your-own-ferrofluid-in-5-minutes http://www.physics.rutgers.edu/cyclotron/images/press_physics_today/Cyclotron.pdf http://chemistry.about.com/od/demonstrationsexperiments/ss/liquidmagnet.htm http://www.sci-spot.com/Chemistry/liqimag.htm
