PPT-Lecture - 3 Resistance equivalent circuits

Outline Resistors in series Resistors in parallel The voltage divider and the current divider circuits Voltage division and current division Measuring voltage and current The toY transformation. A discussion of fire scenarios and models for steel framed enclosed multi-storey balconies. . Gordon Cooke. International . Fire Safety . Consultant. ( Formerly Visiting . Professor, School of Engineering and Mathematical Sciences, City University, . for Power Gating Designs. Speaker: . Zong. -Wei . Syu. Dep. of EE, National Cheng Kung University. Date: . 2014/04/01. Introduction. Preliminaries . Problem Formulation. Partition Based Placement Algorithm. Bellwork. : Use the Ohm's law equation to determine the missing values in the following circuits.. Drawing Electrical. Circuit Diagrams. name variable unit symbol . source of . emf. ε volts V . I. Circuits. A flow of electrons is called a current.. Symbol - I. Unit is Amperes or Amps (A). I = q/t . Current is amount of charge per time.. B. What is a circuit?. A circuit is any . closed loop. pg. . 51. Objectives. Calculate the equivalent resistance for resistors connected in both series and parallel combinations.. Construct series and parallel circuits of lamps (resistors).. Observe and explain relative lamp brightness in series and parallel circuits. . Suggested Problems. 15. The . current in a single-loop circuit with one resistance R is 5.0 A. When an additional resistance of 2.0 . Ω. is inserted in series with R, the current drops to 4.0 A. . What . Brightness of lamps is depended upon the ______________ in a circuit. When all current travels in all of the devices, said to be in . Series. B/c current travels through all, current is same through out. Electric Current - . Flow of electrons through a material. Electrical Potential – . Similar to potential energy . Remember PE is . llifting. something higher against the force of gravity gives it greater potential to do work, increasing its potential energy.). Vocabulary. Electric . charge. (q) – exists due to excess or deficient electrons on an object. Charge comes in two kinds: positive and negative. . The unit of charge is the coulomb.. Electric . current. Electromagnetic Force. The current in a circuit is driven by…. Generally, what . is needed for motion to take place?. Consider that electric current is the movement of electrons. what is the tension (pressure) on the current?. Michael Fowler, . UVa. Today’s Topics. Mention of AC. Semiconductors and superconductors. Battery . emf. , internal resistance. Series and parallel resistances. Kirchhoff’s rules. AC and DC. Batteries. Dr. Dave Shattuck. Associate Professor, ECE Dept.. Lecture Set #1. Thévenin’s and Norton’s Theorems including Dependent Sources. Version 20. Thévenin’s and Norton’s Equivalents and Dependent Sources. 李宏毅 . Hung-. yi. Lee. Textbook. Chapter 2.1, 2.3. Outline. Concept of Equivalent . networks . Equivalent . networks only with resistors. Equivalent networks . with . independent sources. Equivalent networks with . The scores will be posted soon.. Class average of 12.46 and standard deviation 3.42. QUESTIONS? PLEASE ASK!. From last time. Temperature dependence of resistivity/resistance . Electrical Energy:. Superconductors.