what is static magnetic field? (about electronics consisting of lorentz force law, ampere's law) etc?
345474
electrostatics, charge need not be 'static' in the sense of unchanging. Instead 'static' implies that the dynamic coupling between electric and magnetic fields can be ignored. In electrostatics we study e-fields, voltage, and charge, but ignore any magnetic fields generated by the motion of these charges or that may be present for other reasons. Because of the electric field's relationship to and interaction with magnetism, electrostatics is a subfield of electromagnetism.\nThe electrostatic approximation\nThe validity of the electrostatic approximation rests on the assumption that the electric field is irrotational:\n\n \n\nFrom Faraday's law, this assumption implies the absence or near-absence of time-varying magnetic fields:\n\n \n\nIn other words, electrostatics does not require the absence of magnetic fields or electric currents. Rather, if magnetic fields or electric currents do exist, they must not change with time, or in the worst-case, they must change with time only very slowly.\n\nIn some problems, both electrostatics and magnetostatics may be required for accuratete predictions, but the coupling between the two can still be ignored.\n\n[edit]\nElectrostatic potential\nBecause the electric field is irrotational,is possible to express the electric field as the gradient of a scalar function, called the electrostatic potential (also known as the voltage). Thus, the electrostatic potential Φ is related to the electric field E by the equation:\n\n \n[edit]\nFundamental concepts\n[edit]\nCoulomb's law\nThe fundamental equation of electrostatics is Coulomb's law, which describes the force between two point charges:\n\n \n[edit]\nThe electric field\nThe electric field (in units of volts per meter) is defined as the force (in newtons) per unit charge (in coulombs). From this definition and Coulomb's law, it follows that the magnitude of the electric field E created by a single point charge Q is:\n\n \n[edit]\nGauss's law\nGauss' law states that "the total electric flux through a closed surface is proportional to the total electric charge enclosed within the surface." The constant of proportionality is the permittivity of free space.\n\nMathematically, Gauss's law takes the form of an integral equation:\n\n \n\nAlternatively, in differential form, the equation becomes\n\n \n[edit]\nPoisson's equation\nThe definition of electrostatic potential, combined with the differential form of Gauss's law (above), provides a relationship between the potential Φ and the charge density ρ:\n\n \n\nThis relationship is a form of Poisson's equation.\n\n[edit]\nLaplace's equation\nIn the absence of unpaired electric charge, the equation becomes\n\n \n\nwhich is Laplace's equation.\n\n[edit]\nStatic charge generation\n[edit]\nCharge separation by contact\nThe presence of surface charge imbalance means that the objects will exhibit attractive or repulsive forces. This surface charge imbalance, which leads to static electricity, can be generated by touching two differing surfaces together and then separating them due to the phenomena of contact electrification and the triboelectric effect. Rubbing two non-conductive objects generates a great amount of static electricity. This is not just the result of friction; two non-conductive surfaces can become charged by just being placed one on top of the other. Since most surfaces have a rough texture, it takes longer to achieve charging through contact than through rubbing. Rubbing objects together increases amount of adhesive contact between the two surfaces. Usually insulators, i.e., substances that do not conduct electricity, are good at both generating, and holding, a surface charge. Some examples of these substances are rubber, plastic, glass, and pith. Conductive objects only rarely generate charge imbalance except, for example, when a metal surface is impacted by solid or liquid nonconductors. The charge that is trans
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I do not know unless it has a weak magnetic field around it or even static electricity
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The force that a magnet exerts is proportional to 1/(r^2), where r is the distance of the object from the magnet. \n\nThe force = (1/(4*Pi*e0)*q1*q2)/(r^2)\nwhere q1,q2 are charges and e0 is a the permittivity of free space.
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Good question:\n\nThere are two ways to create a magnetic field. One is to move charges or  create time dependend electric fields, that's part of the classical electrodynamics and referred to as electromagnetism.\n\nThe other one is through the "elementary magnets" in a substance. These elementary magnets are related to the spin of the subatomic particles, for example the electrons in a crystall lattice. That's what you usually call the magnetic properties, like ferro-, para-, ... magnetism.\n\nAlthough it seems that these are quite different things they are related to each other by the Einsteins theory of relativism.\n\nConsider a chain of moving electrons, each having an electric field. In the reference system of the electrons the just have the usual electric field of a resting electron. But a resting observer would see a different distance between the electrons because of the relativistic length dilation, and because of that feel a different electric field, if calculated properly this would explain electromagnetism as a relativistic correction to the electrodynamics.\n\nThe basic equation of quantum dynamics is the Schrödinger equation, which is a non relativistic equation and couldn't predict the spin. Dirac (and Klein and Gordon) made some relativistic extensions to the Schrödinger equation, and it showed up that now the extended Schrödinger equations (Dirac and Klein-Gordon equations) now contain the spin of the elementary particles.\n\nSo yes: From a phenomenological point of view there is a difference, and no, from a higher point of abstraction they are both relativistic effects and there is no difference.
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http://www.amasci.com/emotor/statelec.html\n\nhttp://www.phys.unsw.edu.au/PHYS1169/beilby/electric_fields.html\n\nhttp://users.pandora.be/educypedia/electronics/electrostatics.htm
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its called "static electricity".???
248658
static grounding I believe
91676
I answered your question already.  Magnetic field strength is governed by amount of current flow.
71697
Electricity generated by relative motion of a magnetic field and an electric charge.\nMaxwell's 2nd equation states that a magnetic field that varies at a given point induces an electric field that exerts a force on an electric charge.  This force moves the charge.  The free electrons in a conductor are such a charge, and are moved by the relative motion of the conductor and the magnetic field.  \nGenerators and transformers are common applications of this effect.  In a generator the magnetic field may be intrinsically constant (created by DC or a permanent magnet), or varying (created by AC).  The conductor is a coil or set of coils.  No mechanical relative motion of the field and conductor is needed if the field is intrinsically varying.  If such relative motion is needed, the coil can be rotated with the magnetic field held stationary or vice versa, so relative motion of the conductor and the magnetic field occur.  \nIn a transformer the current is always AC and no mechanical motion is needed.  The magnetic field is produced by an input coil (an electromagnet), which shares its core with the output coil for good magnetic field coupling.
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mass of the object\nforce of the magnet in a magnetic field\nthe object's own interference with the magnet
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A static charge produces an electric field.  A moving charge produces a magnetic field.\n\nWhether you are moving or not and whether or not there are spatial variations in the fields determines what you see (some combination of electrical and magnetic fields).
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1) Magnetic field due to a current passing in a circular loop:\n        B=(PIN)/2r where\n  P is the permeability of the medium\n  I is the electric current\n  N is the number of turns\n  r is the radius of the loop\n\n2) Magnetic field due to a current in a soleniod:\n         B=(PIN)/L\n         B=PIn     where\n   P is the permeability of the medium\n   I is the electric current\n   N is the number of turns\n   L is the length of the coil\n   n is the number of turns per unit length\n\nAbout V & B\ni don't know any formulas that contain V & B \n\ni hope i could helped u
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Doubtul.  The earth's magnetic field simply isn't that strong.  If it were, it would overwhelm any electronic devices on earth due to induced current.  While overall it's strong enough to protect us from harm from the solar wind and other nasty charged particles in space, it's not strong enough to harness locally for any useful work.
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Electromagnetism is the what allows information contained in electric circuits to actually leave the circuits. Althought he technique by which the information (electric signal) actually leaves the circuit is quite complicated, suffice it to say, that using an antenna, this information can be allowed to travel through air.\nCo-incidentally, even light happens to be an electromagntetic wave. So, you can say that human beings owe their vision to electromagnetism.\n\nMircowaves - an electromagnetic phenomenon allow you to exhange information with satellites, besides of course, allowing you to cook food.\n\nThink about it! Radio, Mobile phone communication etc. all owes its existence to electromagnetism.\n\nThis is course is with respect to electromagnetic wave phenomeona. When you actually think about the fact that one can create artificial magnetics using electric current, the possibilities are limitless
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http://en.wikipedia.org/wiki/Magnetism
605330
well, if an object is moving, there must be some physical force applied to it - magnetic field, static electicity, pull from a sting, air pressure from a fan.
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In physics, a magnetic field is an entity produced by moving electric charges (electric currents) that exerts a force on other moving charges. (The quantum-mechanical spin of a particle produces magnetic fields and is acted on by them as though it were a current; this accounts for the fields produced by "permanent" ferromagnets.) A magnetic field is a vector field: it associates with every point in space a (pseudo-)vector that may vary in time. The direction of the field is the equilibrium direction of a compass needle placed in the field.