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What device is made from a coil of wire that carries a current and produces a magnetic field?
These devices are called generators, alternators, magnetos, or dynamos. These devices produce electrical energy from mechanical energy. The opposite is a motor which produces mechanical energy from electrical energy.
What is the layer in which the magnetic field of the Earth is produced?
The outer liquid core produces the strong magnetic field of the Earth, through the dynamo effect.
Where are the magnetic field and force weakest in a magnet?
Since the poles are on the right and left ends, the weakest part would be in the middle.
What causes Magnetic stripes on the seafloor are caused by?
These "stripes" formed the pattern known as magnetic striping. ... They hypothesized that the magnetic striping was produced from the generation of magma at mid-ocean ridges during alternating periods of normal and reversed magnetism by the magnetic reversals of the Earth's magnetic field.
Why do the earth have a magnetic field?
An excerpt from a paper by D.R. Fearn: The problem of magnetic field stability is complementary to the (much more widely studied) kinematic dynamo problem The dynamo mechanism converts the mechanical energy of convection into magnetic energy. If the field generated is unstable then the instability extracts energy from the field and might be expected to limit the strength of field attainable. This is an important consideration since the toroidal part of the field in the Earth's core is shielded from us by the insulating mantle and we do not know its strength. [Measurements of the DC electrical potential near the top of the mantle have been extrapolated downward to estimate the toroidal field at the core-mantle boundary (CMB), ...). This gives a toroidal field strength of a few gauss ( at the CMB), but with a weakly conducting mantle, a low value is to be expected and this result is not inconsistent with a strong toroidal field in the interior of the core (...)] There are good reasons for believing the toroidal field may be significantly stronger than the observed (poloidal) part of the field. If so, theoretical considerations may be the only way we have of determining the strength of the major component of the field. Linear theory (...) has shown that a broad class of fields, characteristic of the Earth's field, are unstable when their maximum strength exceeds a value of the order of 60 gauss which is a factor 10 greater than the observed poloidal field but is in line with many estimates of the hidden toroidal field. (...) To explain the observed features of the geomagnetic field, it is clearly important to understand how a magnetic instability evolves. Link below.
Why is light in the electromagnetic spectrum Is light a type of electromagnetic radiation But how does that work Light is not magnetic or is it?
Part of the electromagnetic spectrum can be detected by eye, and we call that bit "light". The thing about electromagnetic radiation is that a varying magnetic field causes a (varying) electric field (that's how power stations make electric current) and a varying electric field causes a (varying) magnetic field. So electromagnetic radiation is what you get when a varying electric field creates a varying magnetic field which in turn contributes the varying electric field. The whole thing then appears as bundled varying electric and magnetic field wave system which propagates at the velocity of light, That is why it is called electromagnetic. There are no magnetic poles or electric charges in it, and it can travel through a vacuum.
What is maxwell's counter part to faradays law?
A magnetic field is induced in an region of space in which and electric field is changing with time.
The length of a part being magnetized by passing an electric current from one end to the other affect 1 permeability 2 strength of magnetic field 3 not affect magnetic field?
Permeability
What is field coils?
field coils generally refer to the electromagnetic coils on the stator ( the stationary part of an electric motor ). these generate the magnetic field(s) necessary to put the rotor ( the rotating part of the motor ) into motion.
Does Uruguay have a magnetic field?
The earth as a single object has a magnetic field. If Uruguay is part of the earth, it shares the earth's magnetic field.
What is the definition of electric field?
An electro-magnetic field is made up of both an electric and a magnetic field. And they both consist of photons. The two fields are orthogonal in direction. Which means their wave directions are perpendicular to each other. EMF's are produced each and every time the momenta of electrons changes. So when the speed, direction, or both of electrons change, EMF is created and the electric field is part of that EMF.
Can you make a magnet without using a magnetic material Explain?
If you are referring to a magnet as an object that possesses a permanent magnetic field, then yes. There are three circumstances where magnetic fields exist, but not as a result of a permanent magnet. 1. Electric current causes a magnetic field. Thus, any wire carrying a current or even a current without a wire (like a lightning bolt) will be surrounded by a magnetic field. Since electric current is made up of moving electric charges, it is actually true than any moving electric charge creates a magnetic field. 2. It is difficult to observe outside of a scientific laboratory, but when there is an electric field that is varying in time, that creates a magnetic field. Though not easy to demonstrate directly, this turns out the physical phenomena the allows the creation of elecrtromagnetic waves, e.g. like the light we see with our eyes. 3. Thirdly, one can cause materials that are not able to work as permanent magnets to act as temporary magnets. This is the basis for electromagnets. A steel or iron core with an electric current running through a coil surrounding the core will produce a magnetic field. If you simply cut off the power source, the electric current will no longer flow through the coil. No electric current, no magnetic field. When a non-permanent magnet is created, the magnetic field it produces is just the same as the magnetic field of a permanent magnet, until the source is removed and the field disappears. All of these matters together are an essential part of the basics of electromagnetism which describes how and why the phenomena work.
What are three parts of a wavelength?
There is one part to a wavelength - the wavelength, measured in metres.
Light waves are electric and magnetic?
Yes. And no. Light is electromagnetic radiation (that's the yes part), but it has no electric charge and it isn't "magnetic" in the normal sense of being attracted to a magnet (that's the no part). The standard models for the description of light is both as a particle (photon) AND a wave (electromagnetic radiation). The electromagnetic radiation model has electric and magnetic field values at right angles to each other propagating at the speed of light in a vacuum.
What physical principle involving electric charges and a magnetic field is employed in the production of an electric current by an electric generator?
The physical principle that produces and electric current by an electric generator is theConservation of the Magnetic field: 0 =(d/dr + Del)(Bs + Bv)The field B is a quaternion field with the scalar part Bs and the vector part Bv.0= dBv/dr + Del Bs + DelxBv = dBv/cdt + Del Bs + DelxBvThis is the vector part (generator) of the Conservation,The magnetic field and electric field are related E=cB thus0= dBv/cdt + Del Bs + DelxBv = dBv/dt + Del Es + DelxEvFaraday did not include the scalar field and the term Del Es is missing from his Law.Del Es is the gradient of the scalar electric field and provides the back emf.The scalar part of the conservation of B is:0= dBs/dr - Del.BvHere too, the scalar filed Bs is left out and scientists declare that Del.Bv is always zero.This too is wrong dBs/dt = Del.Ev = rho/epsilon = zc rho = zJs
What waves have an electric and magnetic part?
ultraviolet waves
What is the function of armature winding of a motor?
Armature is a rotating part of the machine, the coil which wound in the core of that rotating part.
