Term | Point Definition |
Magnet: | It is a substance mainly Iron Oxide which has the ability to attract iron dust, attractive or repulsive property, and directive property. |
Magnetic Di-poles: | The system of two opposite and equal strong poles separated be a small distance is known as Magnetic Dipoles. |
Magnetic Field: | The area around which the magnetic force of interaction can be experienced is known as Magnetic field. It also may be defined as the region in which Magnetic effect due to a magnet can be detected is called its magnetic field. |
Intensity of Magnetic Field: | The magnetic field intensity at a point is force experienced by per unit N-pole at that point. [N.B. Field intensity, Intensity of field, Field strength or simply Field is all synonymous. Most time we define field intensity as force experienced by a unit N-Pole, but it's better to write force experienced by per unit N-pole.]
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Magnetic Permeability: | The ability of a substance to magnetize in a magnetic field is known as its permeability and denoted by ยต.It also may be defined as extent of magnetization per unit magnetic field. |
Magnetic Reluctance: | The ability of substance to prevent magnetization in a magnetic field. It is reciprocal of magnetic Permeability, and is also defined as required magnetic field per unit magnetization. [N.B. Magnetic Permeability & Magnetic Reluctance both are similar to electric Conductivity and Resistivity. But they are not remain always constant like them.] |
Magneto-Motive Force (M.M.F.): | The work done in moving the unit N-Pole through a magnetic circuit is known as the M.M.F. of that cicuit. |
Magnetic Potential: | At a point it is defined as the work done in bringing a unit N-pole from infinity to that point. At a point Magnetic Potential is distance integral of field intensity from the source. |
Ferro-Magnetic Substance: | It is the substance which is largely attracted even in feeble magnetic field. These have high permeability values. |
Para-magnetic Substances: | These are the substances which are feebly attracted by magnetic field. |
Dia-Magnetic Substances: | The substances which are feebly repelled by the magnetic field. |
Retentivity: | The ability of a ferromagnetic substance to retain its magnetization even the external applied field is removed. |
