Intensity definition4/1/2023 Charles Mcnultytheater Critic, Los Angeles Times, 3 Mar. Get some practice of the same on our free Testbook App.Recent Examples on the Web The stakes are comparatively small scale, but the intensity of the fighting is fierce. Please remember this is a very important topic considering the JEE Main Exam. This was all about the concept of magnetic intensity. Magnetic flux intensity formula at an equatorial point is.Magnetic field intensity formula at an axial point is.The area within the B-H curve depicts the energy dissipated per unit volume in the material when it is carried through a cycle of magnetization.The relation drawn between B and H is known as the Hysteresis curve.Where M is the magnetic moment per unit volume. For a magnetic material placed inside a magnetic field, the relation becomes μ(H+M).In vacuum, the relation between H and B is given by B = μH.The magnetic flux density (B) is the magnetic moment developed per unit volume of a material when placed in a magnetizing field.A magnetic field intensity or strength of 1 ampere per meter is produced at the center of a single circular coil of conductor of diameter 1 meter when it carries a current of 1 ampere.The force exerted by the north pole of the magnet at point P is : Calculation of Magnetic Field Intensity at Different Points 1. And the closed area ‘abcdef’ which represents the cycle of magnetization of a ferromagnetic sample is called its hysteresis loop. This graph drawn to depict the relation between magnetic field intensity H and magnetic flux density B for a material placed in the magnetizing field is known as the hysteresis curve. The value of reverse magnetizing field intensity H required for the residual magnetism of a sample to become zero is called the coercivity of the sample. The magnetic induction left behind in the sample is called residual magnetism or retentivity. That means the magnet is not demagnetized even when the magnetizing field has been removed. It is found that magnetic induction B is not zero even after H becomes zero. If magnetizing field intensity H is gradually decreased to zero, B decreases but along a new path ‘ab’. it also depends on the past history of the sample. The permeability μ is not constant and varies with H. As the magnetic field intensity H varies, magnetic induction B does not vary linearly. When a ferromagnetic sample is placed in a magnetizing field, it gets magnetized by magnetic induction. Inside a magnetic material, the total magnetic field is the resultant of B O and B M produced due to magnetization. The difference between the two arises in a magnetized material. It is measured in tesla and is a vector quantity.Īpart from units, B and H are the same in a vacuum. Magnetic flux density is the measure of the number of magnetic lines of flux that passes through a point on a surface. Sometimes, the definition of magnetic flux intensity/density and magnetic field intensity can be confusing. The relation between the magnetic flux density and the magnetic field intensity is given by : The magnetic flux density (B) is the magnetic moment developed per unit volume of a material when placed in a magnetizing field. “ A magnetic field intensity or strength of 1 ampere per meter is produced at the center of a single circular coil of conductor of diameter 1 meter when it carries a current of 1 ampere.” The SI unit of magnetic field intensity is Ampere/meter (A/m).Īccording to David C Jiles, magnetic field intensity definition is as follows: In simple terms, it is a measure of how strong or weak any magnetic field is. Magnetic field intensity (H) at any point in the magnetic field is defined as the force experienced by the unit north pole at that point.
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