PPT-Electrical Resistance and Resistivity

What IS Resistance On what will resistance depend Electrical Resistance A measure of how easily charge flows through a material A Resistor is a material of significant resistance that has been placed in an electric circuit in order to control current or voltage. The resistivity may be used to determine the dielectric breakdown dissipation factor moisture content mechanical continuity and other important properties of a material The volume resistivity of some insulators such as sapphire and Teflon can be as Chapter 12. Electrical Methods. Geologic Resistivity 101. Resistivity surveying investigates variations of electrical resistance, by causing an electrical current to flow through the subsurface using wires (electrodes) connected to the ground.. Earthing. D.K.Pathirana. Applications of . earthing. • Protect human against lightning and earth fault condition. • Protect the premises against lightning and earth fault condition. • Provide low resistance and safe path for lightning and fault current. AP Physics C. Internal Resistance. All components in a circuit off some type of resistance regardless of how large or small it is. Batteries especially have what is called an . internal resistance. , . Learning objectives. Candidates should be able to:. (a) define . resistivity . of a material;. (b) select and use the equation. (. c) describe how the . resistivities. of metals and. semiconductors are affected by temperature;. and Ohm’s Law. The basics of electrical measurement. . Voltage is electrical pressure, which is potential force or the difference in electrical charge between two points. Voltage pushes electrical currents though a wire but not through its insulation.. AP Physics C. Internal Resistance. All components in a circuit off some type of resistance regardless of how large or small it is. Batteries especially have what is called an . internal resistance. , . for. the . DL. . Committee. : . The full . presentation. . discusses. . three. . lab. . methods. & . applications. and . is. . comprised. . of. 52 . slides. . . The . presentation. . Comparing shocks from static electricity and electric currents is like comparing apples and oranges, they are similar but quite different at the same time.. Every year many people are injured and sometimes killed from electrocution as even small amounts of electric current can be lethal. . 1 1. Personal Record Name : Loke Meng Heng Address : 115 Cangkat Minden Jalan 5, Minden Heights, 11700 Penang, Malaysia. Contact details : Tel : + 6046682920 Email : drmhloke@yahoo.com, drmhloke@gma What is well Logging. Well log is a continuous record of measurement made in bore hole respond to variation in some physical properties of rocks through which the bore hole is drilled. . Traditionally Logs are display on girded papers shown in figure.. Resistivity. Mrs. . Ndidiamaka. . Eluwa. Department of Physics/Geology/Geophysics. Faculty of Science. Introduction. Principles of Resistivity. In this method, electric current are introduced into the subsurface and this alteration disturbs the distribution of electric potentials. . Campi. . Flegrei. , Italy. Tarallo Daniela. 1. , . Cavuoto. Giuseppe. 1. , Di Fiore Vincenzo. 1. , Pelosi Nicola. 1. , . Punzo. Michele. 1. , Milano . Maurizio. 2. , . Contiero. . Massimo. 2. , . Lecture 02. Resistance &. Star-Delta Transformation. We . will learn here… . Fundamentals of Resistor. Star . & Delta connections. Star-Delta & Delta-Star Transformations . Resistors. Resistance.