Magnetism Theory

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A. Magnetism Magnetism is one part of the combined electromagnetic force. Magnetism is a physical phenomenon emerging from the force brought on by objects that produce fields that attract or repel other objects (Lucas, 2015). According to Suckling (n.d.), magnetism is a phenomenon associated with magnetic fields, which emerge from the movement of electric charges. This movement can take numerous forms. It can be an electric current in a conductor or charged particles traveling through space, or it can be the movement of an electron in an atomic orbital. Magnetism is also connected with elementary particles, for example, the electron, that have a property called spin. Kurthus (2013) stated that magnetism is a force of attraction…show more content…
Magnetic Fields like in Earth make magnetic compass needles and other permanent magnets to line up in the direction of the field. Magnetic fields force moving electrically charged particles in a round or circular way. This force--applied on electric currents in wires in a magnetic field--underlies the operation of electric motors. Around a permanent magnet or a wire carrying a steady electric current in one direction, the magnetic field is stationary and mentioned to as a magnetostatic field. At any given point its magnitude and direction remain the same. Around an alternating current or a fluctuating direct current, the magnetic field is constantly changing its magnitude and direction. Magnetic fields might be represented by continuous lines of force or magnetic flux that rise up out of north-seeking magnetic poles and enter south-seeking for magnetic poles. The magnitude of the magnetic field is showed by the density of the lines. At the poles of a magnet, for instance, where the magnetic field is strong, the field lines are gathered together, or denser. Farther away, where the magnetic field is weak, they spread out, turning out to be less dense. A uniform magnetic field is illustrated by equally spaced parallel straight lines. The heading of the flux is the direction in which the north-seeking pole of a small…show more content…
Ferromagnetism Ferromagnetism is the property of specific materials (e.g., Iron) that enables them to form magnets and be pulled by magnets. In physics, several different types of magnetism are known and ferromagnetism is the strongest in all types of magnetism. It is the strongest because it has a force strong enough that it can be felt, and it is responsible for the common occurrence of magnetism encountered in everyday life (Boundless, 2016). Ferromagnetic materials displays a a long-range ordering occurrence at the atomic level which causes the unpaired electron spins to line up parallel with each other in a region called a domain. In the domain, the magnetic field is extreme, but in a bulk sample, the material will usually be unmagnetized because the domains will, themselves, be randomly oriented with respect to one another. Ferromagnetism shows itself in the way that a small externally imposed magnetic field, say from a solenoid, can bring about the magnetic domains to line up with each other and the material is said to be magnetized. The driving magnetic field will then be expanded by a large factor which is generally expressed as a relative permeability for the material. There are practical applications uses of ferromagnetic materials, e.g., electromagnet (Hyperphysics,