PPT-Chapter 22: Induction and Alternating Current

pp 793 820 Essential Questions How can current be produced without a power source How do motors work How is mechanical energy converted to electrical energy Objectives We will be able to. Electricity supplied from a battery will be DC but that supplied from the public electricity supply is AC AC has the advantage that it can be transformed to higher voltages where losses in its transmission are significantly lower than those hat woul PHASE . A.C . CIRCUITS. ELECTRICAL ENGG SCIENCE. . CHAPTER - 6. CONTENT. 1. Generation . of alternating voltage and current . . 2. Different . forms of E.M.F equations. . 3. A.C . through R, L and C and power factor . A-9 Figure 9: SPECIFIER GUIDE A-8 ALTERNATING-CURRENT INDUCTION MOTORS Chapter. 31. Copyright © 2014 John Wiley & Sons, Inc. All rights reserved.. 31-1. Electromagnetic . Oscillations. 31.01 . Sketch an LC oscillator and explain which quantities oscillate and what constitutes one period of the oscillation.. Learning Outcomes. Distinguish between alternating and direct current.. State . the frequency of UK mains electricity.. Describe . how the potential of the live wires varies each cycle.. State . that the potential of the neutral wire is approximately . Read pages 439 - 454. AC Generator. As the ring rotates within the magnetic field, what happens?. Sketch a graph to show how the rotation of the ring will affect the reading on the attached voltmeter.. Key Points. Ohm’s Law. Resistivity. Electric Power. Alternating Current. References. . 18-1,2,3,4,5,6,7. Electric current is the rate of flow of charge through a conductor:. Unit of electric current: the ampere, . Section 1: Magnetism. Section 2: Electricity and Magnetism. Section 3: Producing Electric Current. Section 1: Magnetism. Magnetism. – the properties and interaction of . magnets. Magnetic field . – the . This Lecture. Last time we have discussed different proof techniques.. This time we will focus on probably the most important one. – mathematical induction.. This lecture’s plan is to go through the following:. No Class on Wednesday March 8. Labs taught by Dr. . Mahes. on Monday and Tuesday.. No quiz on . Friday, March 10. Exam 2 on Friday, March 24, study guide posted online. Current from a battery flows steadily in one direction (direct current, DC). Current from a power plant varies sinusoidally (alternating current, AC).. Essential idea:. Generation and transmission of alternating current (ac) electricity has transformed the world.. Nature of science:. Bias: In the late 19th century Edison was a proponent of direct current electrical energy transmission while Westinghouse and Tesla favored alternating current transmission. The so called “battle of currents” had a significant impact on today’s society.. What is the need for an AC circuit?. The generation of single phase voltage.. The relation between time and angle.. The maximum, average and effective value.. The form factor and peak factor.. Phasor representation of sinusoidal waveform.. AC. )?. Why the AC generated? What is the need for an AC circuit?. Alternating Current Waveforms. Different (Alternating) Sinusoidal Current Waveform Generators. There are 2 types of Current. DC = Direct Current . The transformer is a static device which is used to transfer electrical energy from one ac circuit to another ac circuit. . Input to a transformer and output from a transformer both are alternating quantities (AC)..