What is magnetic force

Cross product is a special kind of vector product in which you get another vector by multiplying the two given vectors, and this resultant vector is perpendicular to both of them. The method to find the magnitude and direction of the resultant vector is as follows: Suppose u have 2 vectors: A & B. | A X B | = | A | | B | sin(t) where t is the angle b\w the 2 vectors. This is the magnitude. to find direction, jst put the palm of ur right hand in the direction of vector A. Now curl ur fingers in the direction of vector B. Wherever ur thumb points, that's the direction of the resulltant!! Magnetic fields are relativistic electric fields (ie. the creation of an electric field due to space contraction from moving charges), but this was not known until Einstein's theory of relativity. Before relativity was discovered, magnetic fields were known to be generated by current (ie. moving charges) or changing electric fields. Yes. The geographical north pole is actually the magnetic south pole, and vice versa. Interestingly though, studies suggest that the polarity of Earth's magnetic field swaps over a very long period. Thus, it is correct to say at some point in time, like geographical and magnetic poles were in the same hemispheres. It's not derived, it's an empirical observation. If you think about it, it should make sense, or at least parts of it should. if there's a force on a charge when it moves through a field, then it makes sense that the force gets twice as big if you: a) m...

\( \newcommand\) • • • • • • learning objectives • Express Hall voltage for a a metal containing only one type of charge carriers The Hall effect is the phenomenon in which a voltage difference (called the Hall voltage) is produced across an electrical conductor, transverse to the conductor’s electric current when a magnetic field perpendicular to the conductor’s current is applied. When a magnetic field is present that is not parallel to the motion of moving charges within a conductor, the charges experience the Lorentz force. In the absence of such a field, the charges follow a roughly straight path, occasionally colliding with impurities. In the presence of a magnetic field with a perpendicular component, the paths charges take becomes curved such that they accumulate on one face of the material. On the other face, there is an excess of opposite charge remaining. Thus, an electric potential is created so long as the charge flows. This opposes the magnetic force, eventually to the point of cancelation, resulting in electron flow in a straight path. Hall Effect for Electrons: Initially, the electrons are attracted by the magnetic force and follow the curved arrow. Eventually, when electrons accumulate in excess on the left side and are in deficit on the right, an electric field ξy is created. This force becomes strong enough to cancel out the magnetic force, so future electrons follow a straight (rather than curved) path. For a metal containing only one type of charge car...

Everyone knows just how fun magnets can be. As a child, who among us didn’t love to see if we could make our silverware stick together? And how about those little magnetic rocks that we could arrange to form just about any shape because they stuck together? Well, magnetism is not just an endless source of fun or good for scientific experiments; it’s also one of basic physical laws upon which the universe is based. The attraction known as magnetism occurs when a magnetic field is present, which is a field of force produced by a magnetic object or particle. It can also be produced by a changing electric field and is detected by the force it exerts on other magnetic materials. Hence why the area of study dealing with magnets is known as electromagnetism. Definition: Magnetic fields can be defined in a number of ways, depending on the context. However, in general terms, it is an invisible field that exerts magnetic force on substances which are sensitive to magnetism. Magnets also exert forces and torques on each other through the magnetic fields they create. Remove All Ads on Universe Today Join our Patreon for as little as $3! Get the ad-free experience for life Visualization of the solar wind encountering Earth’s magnetosphere. Like a dipole magnet, it has field lines and a northern and southern pole. Credit: JPL They can be generated within the vicinity of a magnet, by an electric current, or a changing electrical field. They are dipolar in nature, which means that they ha...

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magnetism, phenomenon associated with Fundamentals Basic to magnetism are B. Magnetic fields are measured in units of B is the −4 tesla.) A fundamental property of a magnetic field is that its flux through any closed surface vanishes. (A closed surface is one that completely surrounds a volume.) This is expressed mathematically by div B = 0 and can be understood physically in terms of the field lines representing B. These lines always close on themselves, so that if they enter a certain volume at some point, they must also leave that volume. In this respect, a magnetic field is quite different from an The most common source of magnetic fields is the i A, the product of the current i and the area of the loop A. In addition, electrons, All matter exhibits magnetic properties to some degree. When placed in an inhomogeneous field, matter is either attracted or repelled in the direction of the NdFeB (an

Magnetic Force Magnetic force is a consequence of electromagnetic force and is caused due to the motion of charges. We have learned that a moving charge surrounds itself with a magnetic field. With this context, the magnetic force can be described as a force that arises due to interacting magnetic fields. Learn more about magnetic force in detail. Table of Contents: • • • • • What Is Magnetic Force? If we place a point charge q in the presence of both a magnitude field given by magnitude B(r) and an electric field given by a magnitude E(r), then the total force on the electric charge q can be written as the sum of the electric force and the magnetic force acting on the object ( F electric + F magnetic ). Magnetic force can be defined as: The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other. \(\begin \) This force is termed as the • The magnetic force depends upon the charge of the particle, the velocity of the particle and the magnetic field in which it is placed. The direction of the magnetic force is opposite to that of a positive charge. • The magnitude of the force is calculated by the cross product of velocity and the magnetic field, given by q [ v × B ]. The resultant force is thus perpendicular to the direction of the velocity and the magnetic field, the direction of the • In the case of static charges, the total magnetic force is zero. Watch the Video and Learn about For...

Most of us have some familiarity with everyday magnetic objects and recognize that there can be forces between them. We understand that magnets have two poles and that depending on the orientation of two magnets there can be attraction (opposite poles) or repulsion (similar poles). We recognize that there is some region extending around a magnet where this happens. The magnetic field describes this region. We require a way to indicate the direction of the field. This is usually done by drawing arrowheads along the lines. Sometimes arrowheads are not drawn and the direction must be indicated in some other way. For historical reasons the convention is to label one region 'north' and another 'south' and draw field lines only from these 'poles'. The field is assumed to follow the lines from north to south. 'N' and 'S' labels are usually placed on the ends of a magnetic field source, although strictly this is arbitrary and there is nothing special about these locations. Very accurate measurement of small magnetic fields has only been practical since the discovery in 1988 of giant magnetoresistance in specially layered materials. This discovery in fundamental physics was quickly applied to the magnetic hard-disk technology used for storing data in computers. This lead to a thousand-fold increase in data storage capacity in just a few years immediately following the implementation of the technology (0.1 to 100 G b i t / i n c h 2 \mathrm G b i t / i n c h 2 G, b, i, t, slash, i, ...