1- A long metallic cone of a length l, shown in figure 1, stands perpendicular on a wide expanded earthed metallic plate in free space. The potential of the cone is V,. Sketch qualitatively the electric field line and the equipotential surfaces. Start with Gauss's law to calculate the following: a) Electric flux density and the electric field intensity in whole space. b) The surface charge density on the cone surface and on the plate. c) The capacitance of the arrangement -V =V, Air gap V-0 Figure 1: A long metallic cone stands perpendicular on a wide metallic plate

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Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.