Magnet example sentences

Michael Faraday, the legendary scientist and discoverer of electricity and electromagnetism, spent four years studying the properties of Indian Wootz (1818-22).It has excellent magnetic qualities, especially valuable in the electrical industry.Do you recall that electric current produces a magnetic effect? What happens to a compass needle kept nearby when current flows in a wire? Even if the current is small, the deflection of the magnetic needle can be seen.Can we make a tester using the magnetic effect of currents? Let us find out.Besides these main minerals, other minerals like chlorite, calcite, magnetite, haematite, bauxite and barite are also present in some quantities in the rocks.Magnetite is the finest iron ore with a very high content of iron up to 70 per cent.After 1821 much of his work was on electricity and magnetism and different electromagnetic phenomena.They mostly form coloured ions, exhibit variable valence (oxidation states), paramagnetism and oftenly used as catalysts.Hematite ore is the most important industrial iron ore in terms of the quantity used, but has a slightly lower iron content than magnetite.