Electrical symbols vary from different countries and design platforms but they are more standardized today. Introduction to circuits and ohms law video khan academy. This is called direct current dc battery powered circuits are dc circuits. Ppt direct current circuits powerpoint presentation, free. Power point covering current voltage and resistance. Rms values since voltage and current are always changing we need some way of averaging out their effect. Henceforth, the conductors that exhibit the property of resisting current flow are called resistors. Physics 231 lecture 62 fall 2008 resistors in series and parallel as with capacitors, resistors are often in series and parallel configurations in circuits series parallel the question then is what is the equivalent resistance.
Electric current, circuit and voltage powerpoint by karen wilson. E 0 within a conductor current i 0, but not all charges are at rest, free electrons can move v 10 6. It reverses its direction while flowing in a circuit. Ch28 direct current circuits to print or download this file, click the link below. Electric current, circuit and voltage powerpoint by karen. Adding resistance in series decreases total current dimmer light bulbs parallel circuits. The emf describes the work done per unit charge and has units of volts. Iowa state analog integrated circuit design course lectures in powerpoint format, spring 2006 an introduction to analog circuit design part 1, planet analog short introduction to cmos design from the national institute of applied sciences insa, toulouse, france.
Find powerpoint presentations and slides using the power of, find free presentations research about alternating current ppt. A free powerpoint ppt presentation displayed as a flash slide show on. Direct current dc is the unidirectional flow of an electric charge. Chapter ac alternating current circuits page 4 answer to essential question ac. Stray current control of direct current powered rail transit systems. Series circuits voltage may be different across different objects in a series circuit. The electrical circuit diagram powerpoint template shows a simple illustration of electric circuit symbol elements. The circuit powerpoint template is a clean, sophisticated and ultramodern template that you can use for presentations about technology and circuitry. Sources of emf the source that maintains the current in a closed circuit is called a source of emf. This instructable will hopefully demystify the basics of electronics so that anyone with an interest in building circuits can hit the ground running. The animation shows what happens when a bulb is removed from e. For simple simple and complex complex circuits, determine the voltage and and current current for each resistor.
Download alternating current versus direct ppt for free. Circuit analysis is the process of finding all the currents and voltages in a network of connected components. Stray current control of direct currentpowered rail transit systems. In this chapter we will explore circuits with batteries, resistors, and capacitors in this course, we will only consider. This is a powerpoint that i used to teach my sixth graders about electric circuits, current and voltage. This module describes the basic concepts of direct current dc electrical circuits and discusses the associated terminology. The source that maintains the current in a closed circuit is called a source of emf. Chapter 25 current, resistance and electromotive force. Chapter 28 direct current circuits hcc learning web. Electric current and direct current circuits powerpoint ppt presentation. Ppt directcurrent circuits powerpoint presentation. Two basic laws that describe the performance of electric circuits are ohms law and kirchhoffs circuit rules. The trb transit cooperative research programs tcrp research report 212.
Alternating current is when current flows in one direction for a set time, then changes direction, then changes back, and so on in a repeating cycle. Resistors in series since these resistors are in series, we have the same current in all three resistors we also have that the sum of the potential differences across the three. Stray current control of direct currentpowered rail transit. User conducting connections wires direct current circuits.
This document refers to the training module 6 only. All currents return to their sources following path of least impedance. Direct current circuits fundamental electrical principles 2. By using a single set of coils, the structure is simplified. The history of electricity starts more than two thousand years ago, with the greek philosopher thales being the earliest known researcher into electricity. Alper guneren 2010512022 ugur karaali 2010512026 1 2. Mar 27, 2017 for devices in your home that operate on direct current, like a flat screen tv, an ac to dc adapter is used to convert the alternating current from a wall outlet to direct current for the device. Basic laws of circuits kirchhoffs current law the algebraic sum of the currents entering a node equal to zero. Chapter vii direct current circuits free download as powerpoint presentation. Solving for the current as time increases, the charge on the capacitor increases, therefore the current in the circuit decreases current will flow until the capacitor has a charge on. Chapter 25 current, resistance and electromotive force current resistivity resistance electromotive force and circuits energy and power in electric circuits theory of metallic conduction.
Calculating resistance, voltage, and current using ohms law. Ii alternating current ac with direct current covered and understood it is now time to delve into the world of alternating current. A free powerpoint ppt presentation displayed as a flash slide show on id. Electron pump battery device that reduces potential. View and download powerpoint presentations on alternating current ppt. Tippens, professor of physics southern polytechnic state university. Ppt direct current circuits powerpoint presentation free to download id.
Circuit closed loop in which current can flow basic simple circuit voltage source voltage uses conducting connections wire. It features a solid dark blue background with circuit lines in light blue color, which gives it a glowing, futuristic effect. The complete electrical troubleshooting program consists of 9 modules individual powerpoint presentations. This is called direct current dc battery powered circuits. Direct current machines electric generators and motors direct current generator voltage values. Any devices that increase the potential energy of charges. Ppt series and parallel circuits powerpoint presentation free to.
We look at the basic elements used to build circuits, and find out what happens when elements are connected together into a circuit. Determine if everyday objects are conductors or insulators, and take measurements with an ammeter and voltmeter. Protect signal carrying conductors from interference. The terminal voltage is the accessible external voltage. Chapter23 alternating current circuits ac circuits resistance capacitance capacitive reactance. Intro to electricity nyu tandon school of engineering. This 11 slide powerpoint includes definitions, examples, videos and demonstrations.
The magnitude of resistance is dictated by electric properties of the material and material geometry. Most of the circuits analyzed will be assumed to be in steady state, with constant magnitude and direction. Introduction simple circuits batteries resistors capacitors kirchhoffs rules conservation of energy conservation of charge steadystate circuits. Ppt direct current circuits powerpoint presentation. Circuit symbols three types of circuits series parallel compound series circuits series circuits have 1 path for charges to flow. Ppt direct current circuits powerpoint presentation free. Rc circuits according to kirchoffs 2nd rule we have using a counterclockwise loop 0 0. Parallel circuits are those which branch off from the power supply. Tippens, professor of physics southern polytechnic state university a powerpoint presentation by paul e. Direct current dc where electrons flow in the same direction. Chapter vii direct current circuits electrical resistance. Ppt electric current and directcurrent circuits powerpoint.
Acdc current ratio in a current superimposition variable flux. Provide return path to the source over the lowest impedance most desirable path possible. These circuit lines run along the sides of the slide, strategically framing the content like a border. Volume 2 of 4 module 3 dc circuits this module introduces the rules associated with the reactive components of inductance and capacitance and how they affect dc circuits. The total current supplied from the power source is divided among each of the branches but voltage is common throughout. For devices in your home that operate on direct current, like a flat screen tv, an ac to dc adapter is used to convert the alternating current from a wall outlet to direct current for the device. Electrical circuit diagram powerpoint template slidemodel. The current in series circuits is constant throughout but the voltage may vary. Direct current circuits direct current dc and circuits. A direct current circuit is an electrical circuit that consists of any combination of constant. In these circuits, energy is conveyed from one place to another. Ohms law with voltage steady, changes in current and resistance 2. Sep 02, 2008 direct current circuits fundamental electrical principles 2.
The frequency of alternating current is 50hz or 60hz depending upon the country. These symbols are used to create an electrical schematic diagram. I direct current dc modern life could not exist if it were not for electricity and electronics. The battery emf is the voltage produced internally. Getting started with basic electronics is easier than you might think. Stray current control of direct currentpowered rail.
Circuit analysis electrical engineering science khan. History of alternating current william stanley, jr. Electric current high current and low current electric circuit voltage high voltage and lo. Generators batteries neglect internal resistance r. Instructor what we will introduce ourselves to in this video is the notion of electric circuits and ohms law, which you can view as the most fundamental law or the most basic law or simplest law when we are dealing with. Chapter 28a direct current circuits a powerpoint presentation by paul e. It shows both the standard circuit symbols, as well as pictures, complete with batteries, light bulbs, and wires. Sum of the individual voltages source voltage current is the same in all parts of a series circuit. The potential difference across the resistor would be the same. An electromotive force device, or emf device, is a source of constant potential. Physics for scientists and engineers 8ed ch28 powerpoint. This behavior of materials is often used to controllimit electric current flow in circuits.
Ppt directcurrent circuits powerpoint presentation, free. Resistors in series and parallel as with capacitors, resistors are often in series and parallel configurations in circuits series parallel the question then is what is the equivalent resistance. The connection between the supply and the load is made by soldering with wires that are often called leads, or with many kinds of connectors and terminals. This is called direct current dc batterypowered circuits are dc circuits. Chapter 28 direct current circuits direct current when the current in a.
Alevel physics dc direct current circuits 5 powerpoints. Series circuits are those which are connected inline with the power source. When the current in a circuit has a constant direction, the current is called direct current. Electrical troubleshooting direct current machines. Sources of emf a source of emf electromotive force maintains a constant current in a closed circuit. View the circuit as a schematic diagram, or switch to a lifelike view. Current and potential difference in circuits draw circuit diagrams with power sources cell, battery or a. Build circuits with batteries, resistors, light bulbs, fuses, and switches. Electric current and directcurrent circuits powerpoint ppt presentation. Power in electric circuits 43 s thorsepower this symbol. A guidebook allows transit agencies, design, and maintenance practitioners to influence new system construction, extensions, and maintenance and operation of existing systems. This is an original powerpoint animation that demonstrates the different between a series circuit and a parallel circuit. A parallel circuit is one that is connected in such a way that the same voltage. Electrical troubleshooting direct current machines powerpoint.