What are some methods of creating a magnetic field?
Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin.[1][2] In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge.
What actually makes a magnetic field?
Magnetic fields are produced by an electric current, which is electrons flowing in a certain direction. The dumbed down explanation my college physics gave was that magnets have their atoms aligned in such a way that most of the electrons are moving the same way, generating the current you need for a magnetic field. 7.
What is the purpose of having a magnetic field?
That is because the magnetic field protects the planet from cosmic rays and charged particles from solar flares. When the charged particles hit the magnetic field, they become trapped and slide along the field lines moving towards the poles.
What are the characteristics of a magnetic field?
- They seek the path of least resistance Resistance (R) - The opposition to the flow of electrical current. ...
- They never cross one another.
- They all have the same strength.
- Their density Density - The mass of a substance per unit volume. ...
- Their density Density - The mass of a substance per unit volume. ...
What makes up magnetic field?
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.
What is an electromagnetic field made out of?
Electromagnetic fields are a combination of invisible electric and magnetic fields of force. They are generated by natural phenomena like the Earth's magnetic field but also by human activities, mainly through the use of electricity.
Does a magnetic field have particles?
All moving charged particles produce magnetic fields. Moving point charges, such as electrons, produce complicated but well known magnetic fields that depend on the charge, velocity, and acceleration of the particles.
Are magnetic fields made of photons?
In a moving reference frame, a magnetic field appears instead as a combination of a magnetic field and an electric field, so electric and magnetic fields are made of the same "stuff" (photons). Some electromagnetic interactions involve "real" photons with definite frequencies, energies, and momenta.
Where is the magnetic field made?
Earth's outer coreThe magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.
Can a magnetic field exist without an electric field?
No you can have a magnetic field without an electric field. Consider a rod with an equal number of positive and negative charges (such that they are equally spaced). Let the positive move to the left with speed v and the negative to the right with speed v. This will result in a magnetic field but no electric field.
Do magnets have frequency?
The magnitude (intensity) of a magnetic field is usually measured in Tesla (T or mT). Static magnetic fields do not vary over time, and as such do not have a frequency (0 Hz). Examples are the fields generated by a permanent magnet or the Earth's magnetic field.
Do magnetic fields have energy?
The energy of the magnetic field results from the excitation of the space permeated by the magnetic field. It can be thought of as the potential energy that would be imparted on a charged particle moving through a region with an external magnetic field present.
Is there any magnetic field in human body?
This article deals with a new area of research, in which magnetic fields from the human body are measured that are as weak as 1 X 10~9 gauss—about one- billionth of the Earth's magnetic field.
Can you see a magnetic field?
Scientists have developed a high-resolution magnetic line camera to measure magnetic fields in real time. Field lines in magnetic systems such as generators or motors, which are invisible to the human eye, can be made visible using this camera.
Can you bend a magnetic field?
Magnetic field lines do not like to bend, so when the space around them becomes warped by large masses, the fields fight back. Magnetic field lines do not like to bend.
Can magnetic fields bend light?
Although a magnetic field doesn't affect the photons of light directly, a magnet can distort the medium through which light passes and thereby “bend” the light rays. Light travels through space-time along a geodesic – the shortest possible path between two points on a curved surface.
Can you bend a magnet?
Common metals are ductile, but sintered magnets are not. A length of steel bends easily, but magnets don't bend at all. Many common metals are fairly ductile. If a material is ductile, that means you can bend or reshape it before it breaks.
How can a magnetic field be produced *?
Solution : A magnetic field can be produced by any of the following ways: (i) by a magnet (ii) by a current carrying conductor (iii) by a moving charge and (iv) by changing electric field.
What if the Earth lost its magnetic field?
But what would happen if Earth's magnetic field disappeared tomorrow? A larger number of charged solar particles would bombard the planet, putting power grids and satellites on the fritz and increasing human exposure to higher levels of cancer-causing ultraviolet radiation.
How many magnetic fields are there on Earth?
Earth has two sets of poles, geographic pole and magnetic poles. Earth's magnetic field can be visualized if you imagine a large bar magnet inside our planet, roughly aligned with Earth's axis. Each end of the magnet lies relatively close (about 10 degrees) to the geographic North and South poles.
How can we produce electromagnetic field?
An electric field can be produced also by a changing magnetic field. The mutual interaction of electric and magnetic fields produces an electromagnetic field, which is considered as having its own existence in space apart from the charges or currents (a stream of moving charges) with which it may be related.
What are the major sources of electromagnetic field?
Our electricity power supply and all appliances using electricity are the main sources of ELF fields; computer screens, anti-theft devices and security systems are the main sources of IF fields; and radio, television, radar and cellular telephone antennas, and microwave ovens are the main sources of RF fields.
How is an electric field created?
A charged object creates an electric field - an alteration of the space or field in the region that surrounds it. Other charges in that field would feel the unusual alteration of the space. Whether a charged object enters that space or not, the electric field exists.
Do electromagnetic fields affect humans?
Despite extensive research, to date there is no evidence to conclude that exposure to low level electromagnetic fields is harmful to human health.
Why are magnetic flux lines important?
Magnetic flux lines are important because of the following reasons: Magnetic field lines are the lines in a magnetic field the tangent of which at...
What causes the Earth’s magnetic field?
The Earth’s magnetic field is generated deep down the Earth’s core. The flow of liquid iron at the centre of the Earth generates an electric curren...
What is magnetic field?
Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts.
Define magnetic flux density.
Magnetic flux density is the amount of magnetic flux in an area taken perpendicular to the magnetic flux’s direction. It is denoted by the symbol B...
Define magnetic field intensity.
The Magnetic Field Intensity or Magnetic Field Strength is a ratio of the MMF needed to create a certain flux density (B) within a particular mater...
Are there magnetic fields in space?
Yes, there are magnetic fields in space. The spiral arms of the Milky Way seem to have some very large-scale organised magnetic field on the basis...
What is magnetic field?
What is a Magnetic Field? Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts. A pictorial representation of the magnetic field which describes how a magnetic force is distributed within and around a magnetic material. Symbol. B or H. Unit. Telsa.
How does a Magnetic Field Originate?
The magnetic field arises when a charge is in motion. There are two basic ways to arrange for a charge to be in motion and generate a useful magnetic field. Following are the two ways:
Why are magnetic flux lines important?
Magnetic flux lines are important because of the following reasons: Magnetic field lines are the lines in a magnetic field the tangent of which at any point will give the field direction at that point and its density gives the magnitude of the field. They denote the direction of the magnetic field.
Why is the magnetic field stronger at the poles?
The magnetic field intensity depends on the number of magnetic field lines. The lines are higher at the poles , that is why the magnetic field at the poles are stronger. The strength of a magnetic field is dependent on the number of magnetic field lines at a particular area of consideration.
How many ways can magnetic fields be illustrated?
Typically, a magnetic field can be illustrated in two different ways.
What is vector field?
The vector field is a set of many vectors that are drawn on a grid. In this case, each vector points in the direction that a compass would point and has a length that is dependent on the strength of the magnetic force. Vector Field of a Bar Magnet.
When was the magnetic field discovered?
The research on the magnetic field began in 1269 when French scholar Petrus Peregrinus de Maricourt mapped out the magnetic field on the surface of a spherical magnet using iron needles. He noticed that the resulting field lines crossed at two points. He named these points “poles.”.
What is magnetic field?
A magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic. [Explain] Most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them.
What are the two aspects of magnetic field?
Because a magnetic field is a vector quantity, there are two aspects we need to measure to describe it; the strength and direction . The direction is easy to measure. We can use a magnetic compass which lines up with the field.
How is magnetic field illustrated?
There are two different ways that a magnetic field is typically illustrated: [Explain : some details] The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid.
How does a magnetometer work?
Most of these magnetometers work by exploiting the force an electron feels as it moves through a magnetic field.
How many atoms are in a tiny piece of material?
Even a tiny piece of material contains billions of atoms. If they are all randomly orientated the overall field will cancel out, regardless of how many unpaired electrons the material has. The material has to be stable enough at room temperature to allow an overall preferred orientation to be established.
Why do iron filings separate from each other?
The filings naturally separate from each other because similar poles repel each other. The result is a pattern that resembles field lines.
When does a magnetic field occur?
Magnetic fields occur whenever charge is in motion. As more charge is put in more motion, the strength of a magnetic field increases.
What is a field in math?
A simple definition of a field is that a field is a mathematical object that assigns every point in space (and/or time) a particular value representing some property associated with that field or what it is trying to describe.
What is a field in science?
A simple definition of a field is that a field is a mathematical object that assigns every point in space (and/or time) a particular value representing some property associated with that field or what it is trying to describe. For example, a classical, static electric field would give you a number at any point in space which represents the direction and magnitude of the force felt by a charged particle located at that point.
Is EM a fundamental field?
The EM field is fundamental. It isn't composed of anything else.
Is a field a particle?
No it doesn't. Fields are not particles.
Is magnetic field a fundamental entity?
The question does not make sense as it stands. The magnetic field is a fundamental entity in classical electrodynamics.
Is a magnetic field line accurate?
Just to be clear here. I suspect the answer your teacher wants is "magnetic field lines" (the others are sources for the magnetic field). This is about as accurate as saying that a force is made up of a vector arrow (i.e., not accurate at all). Vector arrows and field lines are visual/mathematical (depending on whether we just use the picture or also the maths) tools that we use to visualise and describe the concepts of forces and fields, they are not what the forces/fields are made up from in any way.
What is magnetic field?
A magnetic field is not a thing unto itself, but a region of space subtended by a force. You could just as well ask: what is a force made of? well, it's not a thing either, so it's not made of anything. A force is a state of matter. Matter is the thing. Matter has mass and charge and spin - these are not things either but they are the cause of force.#N#So a magnetic field is simply the manifestation, in spatial terms, of the attributes - mass, charge, spin - of the things, which are particles or atoms or bodies that possess the qualities of mass, charge, spin (etc.)#N#Fields are densities, for example Webers per meter or Volts per meter. Notice, you would not think to ask this of forty-weight motor oil. 40W is a density. So imagine asking: what is a 40W made of? See, it doesn't make sense.#N#The notion of fields has been popularized by Sci Fi (and maybe Sci Fo!) so that we have all kinds of artistic renderings of it in our mind. These renderings tend to slip into the holes where we haven't covered some uncertainty with a sanity check, something to keep us grounded in reality before we lose touch with basic principles that hold everything together.#N#Having said all of this, I am also interested in how fields arise, how they propagate and what is going on with virtual particle exchange, and the underlying mechanisms, so if that was where you were headed, I'll kick back and listen.
How is a magnetic field made?
A magnetic field is made by pushing the Aether apart. This creates an empty chamber, and the empty chamber is the area of least resistance, the lowest pressure. Material wants to move into this chamber. Action At A Distance is to have this chamber held open until an observer closes it, and it is then touched by Aether, and an interaction takes place. Now this is the correct answer because I have deduced it from years of building the foundations that lead up to it. It is not pulled out of my ass. If this post is deleted, you will never have the answer, it's as simple as that.
What is field in science?
A field is an abstraction of a real phenomena. They (to the best of our knowledge) are not made of anything (i.e. they have no constituent parts).
Is a field made up of constituent parts?
Existing evidence suggests that fields are not made up of constituent parts (i.e. they are simply fundamental entities).
What are the materials that make up magnets?
There is a group of materials known as ferromagnetic materials. This group includes iron, cobalt, nickel, and some alloys of rare earth elements (mainly neodymium and samarium).
What type of magnet is created when a current of electricity moves through a coil of wire?
Another type of manmade magnet is the electromagnet. Electromagnets are created when a current of electricity moves through a coil of wire. The coil is magnetic as long as it is receiving the electrical current. But pull the plug on the electricity, and you’ll pull the plug on the magnetism, too.
What is a permanent magnet?
These are referred to as permanent magnets. Some will only be magnetic when in the presence of an external magnetic field, such as from a permanent magnet. These “temporary” magnets are called soft magnets. *Permanent magnets can lose their strong magnetism when heated to a Curie Temperature.
Can you make your own magnet?
While you’d need highly specialized machinery to create most manmade magnets, you can create your own simple electromagnet or conduct in-depth electromagnet projects at home or in school!
Is lodestone a magnet?
Lodestone, a naturally magnetized piece of magnetite, attracts iron, so it is technically a magnet. There are some fun stories about the ancient discoveries and uses of magnetite and lodestone on our blog. The rest of the magnets we see today are created—manmade. There is a group of materials known as ferromagnetic materials.
