^Magnetic elements of earth
Magnetic elements of earth Declination (θ), Dip (δ) & Horizontal component (BH) are called magnetic elements of earth as earth’s […]
Entries by kp-web-admin
^Geomagnetism
Geomagnetism 1. Study of magnetic field of earth is called Geomagnetism or terrestrial magnetism. 2. William Gilbert (in about 1600) […]
^Dipole’s natural alignment
Dipole’s natural alignment Any magnetic needle (or a dipole) free to move in a region of external magnetic field aligns […]
^Superconductors: Perfect diamagnetics
Superconductors: Perfect diamagnetics For super conductors cooled to very low temperatures χ = –1 & μr = 0. Thus the […]
^Magnetic screening
Magnetic screening Magnetic field inside a ferromagnetic substance e.g. soft iron is zero. Thus any object can be saved from […]
^Ceramics
Ceramics Or ferrites (usually brittle) are made by heat & pressure treatment from the powders of BaO & FeO. Used […]
^Magnetic keepers
Magnetic keepers The bar magnets are stored in pairs with their opposite poles together & a soft iron piece across […]
^Electromagnets
Electromagnets Core of electromagnets are made of ferromagnetic materials which have high permeability and low retentivity. Soft iron is a […]
^Permanent magnets
Permanent magnets The materials used in making permanent magnets should have high retentivity, high coercivity & high permeability. High retentivity […]
^Corecivity (oc):
Corecivity (oc): The value of –H which has to be applied to a magnetic material so as to reduce residual […]
