Free Essay

Resistors and Light Bulbs Lab Report

In:

Submitted By mzinnocents1234
Words 757
Pages 4
Lab 2 Problem 4: Resistors and Light Bulbs
Ruth Nyagitari
March 8, 2016
Physics 1202W, Professor: Thomas Walsh, TA: Joshua Hitbrand
Abstract
In order to determine the similarities and differences of the electrical properties of light bulbs and resistors the relationship between the voltage across a light bulb and the current through the light bulb was compared to a resistor. A power source was used as a source of potential difference. The change in resistance was observed as well as change in the applied voltage. The voltage versus the current was analyzed using ohms law it was predicted that if voltage across a resistor increases the current through the resistor will increase as well.
Introduction
While debating about the role of electric circuits in biological systems it was argued that a light bulb may not be a good model for biological electrical energy transfer. A light bulb is easy to observe difference in energy transfer rates by observing the change in brightness. However in order to give light it’s raised to temperature higher than biological systems. Instead a resistor was suggested to be a better model for biological systems because its transfers energy out of the electric circuit without extreme behavior of a bulb. To determine the similarities and difference between use of bulbs and resistors a graph is drawn depicting the relationship between the voltage across a light bulb to the current through the light bulb and then compared to a resistor. In the experiment testing was done to determine if a light bulb is a constant resistor and how its resistance changes with current changes.
Prediction
This experiment uses the concept of direct circuit to demonstrate ohms law. Ohms law gives the relationship between the current (I) that flows through a resistor and the voltage through it. Ohms law shows that voltage is directly proportional to current. The relationship between voltage, current and resistance is shown below; I=V/R V=I X R R=V/I
It was predicted that if voltage across a resistor increases the current through the resistor will increase as well. The voltage across light bulb and the current across the light bulb were measured and manipulated to solve for resistance. The resistance from the light bulb was determined from the graph of voltage versus current. This resistance will be compared with resistance of a resistor to analyze their electrical behaviors. From the ohms law equation, the higher the current the low the resistance and the higher the voltage the higher the resistance. Through graphing it will possible to determine the resistance difference between the light bulb and the resistor.
Procedure
A light bulb was connected to power supply in a circuit using banana wires. Range of voltages was applied in order to observe the change in brightness of the light bulb. Using the digital multimeter (DMM), voltage was measured by connecting the DMM to the circuit I parallel. Current was measured too by connecting the DMM to the circuit in series. Several trials were run while manipulating the applied voltage and recording current. The circuit as set up as shown in the diagram below;

Fig 1: Assembly of circuit used in procedure.

Data
Data points were collected with varying voltages and resulting current.
Table 1: applied voltage with resulting current. Uncertainty (± 0.01) VOLTAGE (V) | CURRENT (A) | 0.00 | 0.00 | 0.52 | 0.00 | 1.92 | 0.31 | 2.69 | 0.40 | 3.38 | 0.46 | 4.10 | 0.55 | 4.94 | 0.63 | 5.46 | 0.68 | 6.40 | 0.75 | 7.21 | 0.80 | 7.58 | 0.82 |

Fig 2: graph of voltage through light bulb vs current thought light bulb

Analysis
Through comparison of the light bulb resistance which is the derivative of the function from the voltage vs current graph; y=-0.0176X + 0.179. This equation suggests that the resistance of the light bulb is not constant but is varying with different voltages and currents. In contrast with that the given resistor resistance was constant. The application of ohms law can be applied here and supports our results. Our results show that increasing voltage increases resistance of the light bulb. This is different with the resistor resistance which stays constant.

Conclusion
The results lead to a conclusion that in order to have an ideal biological energy transfer model a resistor is more appropriate than a light bulb. The resistor electrical functions displays prominent attributes that would make it a great model for measuring the rate of energy transfer in a biological system.

Similar Documents

Premium Essay

Vocabulary on Edgar Allan Poe the Raven

...|Lesson Synopsis: | This unit develops an understanding of electrostatics by the use of demonstrations, simulations, and modeling. The general theme is that the current model of matter consisting of electrically neutral atoms composed of charged particles is integral to the understanding of electrical forces. The lesson begins with traditional activities of charging objects by friction and comparing electrostatic forces to magnetostatic forces. The traditional experiments are explained in terms of the model of an atom, and the “attract and repel force rules” are explored and expanded. Devices to create, store, and measure charge are utilized in experiments. The formal theory of Coulomb’s law is introduced, and problems are assigned utilizing that theory. Elements of the historical development of electrostatics and planetary model of the atom are researched, and students have an assignment describing contributions of historically important scientists. Additional concepts of electric fields, potential difference, and properties of conductors and insulators are developed through experiment, demonstration, and discussion. TEKS: |P.5 |The student knows the nature of forces in the physical world. The student is expected to: | |P.5A |Research and describe the historical development of...

Words: 7361 - Pages: 30

Premium Essay

Student Engagement

...studentNational University of Singapore MW5200 MSC SCIENCE COMMUNICATION PROJECT Project Report Strengthening student engagement in the classroom. Course: Msc (Science Communication) Faculty of Science National University of Singapore Ganeshini D/O Sri kanthan A0075383Y Name: Student ID: Project Supervisor: A/P Helmer Aslaksen ABSTRACT The Ministry of Education (MOE) recognizes the importance of student engagement in the classroom. However, keeping students engaged in the classroom is a challenge for many educators these days. Student engagement is a contested concept, theorized in a variety of different ways within academic literature. This projects aims to define and understand the concept of student engagement. The purpose of this project was also to find out the usage of engagement based approaches in the classroom. The survey results in this project indicate that teachers do use these approaches in the classroom but not frequently enough. Usage of engagement based approaches in the classroom can be increased with changes in attitudes of teachers, sufficient support from schools and changes in modes of assessment. i AKNOWLEDGEMENTS I would like to thank the following people who have helped me in making this Masters Project interesting and a memorable one:    Associate Professor Helmer Aslaksen for his guidance and patience. Without his constant assurance and encouragement this would not be possible. Colleagues and friends who contributed...

Words: 34614 - Pages: 139

Premium Essay

Ee 101 for New Beginners

...Electrical Engineering 101 Third Edition Electrical Engineering 101 Everything You Should Have Learned in School… but Probably Didn’t Third Edition Darren Ashby AMSTERDAM • BOSTON • HEIDELBERG • LONDON NEW YORK • OXFORD • PARIS • SAN DIEGO SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Newnes is an imprint of Elsevier Newnes is an imprint of Elsevier 225 Wyman Street, Waltham, MA 02451, USA The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, UK © 2012 Elsevier Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the Publisher. Details on how to seek permission, further information about the Publisher’s permissions policies and our arrangements with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/ permissions This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein). Notices Knowledge and best practice in this field are constantly changing. As new research and experience broaden our understanding, changes in research methods, professional practices, or medical treatment may become necessary. Practitioners and researchers must always rely on their own experience and knowledge in evaluating...

Words: 111107 - Pages: 445

Free Essay

What Is the Internet of Things

...What Is the Internet of Things? Mike Loukides & Jon Bruner ISBN: 978-1-491-92180-7 THE O’REILLY INTERNET OF THINGS CONFERENCE “The future has a funny way of sneaking up on you. You don’t notice it until you’re soaking in it. That was the feeling at O’Reilly’s Solid Conference.” — Wired The traditional boundaries between hardware and software are falling. It’s a perfect storm of opportunity for a software-enhanced, networked physical world. The new products and services created from the melding of software, hardware, and data are built by people who work across disciplines and industries. A vibrant new community is emerging, made up of business and industry leaders, software developers, hardware engineers, designers, investors, startup founders, academics, artists, and policy makers—many of whom have never come together before. They gather at Solid to be inspired, to make connections and launch conversations, and to plug into the future for a few days. Will you be a part of it? Find out more at solidcon.com What Is the Internet of Things? Mike Loukides and Jon Bruner What Is the Internet of Things? by Mike Loukides and Jon Bruner Copyright © 2015 O’Reilly Media, Inc. All rights reserved. Printed in the United States of America. Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472. O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles (http://safaribooksonline...

Words: 9994 - Pages: 40

Free Essay

Technical Report Writing

...THE UNIVERSITY OF THE WEST INDIES ST. AUGUSTINE, TRINIDAD AND TOBAGO, WEST INDIES FACULTY OF ENGINEERING & ENGINEERING STUDENTS’ SOCIETY Technical Report Writing Workshop Facilitated by: Halcyon Lawrence March 03, 2007 Table of Contents Topic 1: The Communication Model ............................................................................. 4 Topic 2: Five Cs of Technical Communication .............................................................. 7 Clarity ............................................................................................................................. 7 Structural Clarity (document level) ............................................................................ 7 Stylistic Clarity ........................................................................................................... 7 Grammatical Clarity.................................................................................................... 7 Contextual Clarity....................................................................................................... 7 Conciseness..................................................................................................................... 8 Document level Conciseness ...................................................................................... 8 Paragraph/sentence level Conciseness........................................................................ 8 Concreteness ......................................

Words: 11012 - Pages: 45

Premium Essay

Lalalal

...1 UNIT 1 Living Things and Their Environment DRAFT April 29, 2014 Photo Credit: http://www.flyingfourchette.com/2013/05/25/around-ubud/ 2 UNIT 1: Living Things and Their Environment Introduction At this point, students have already learned in Grade 8 how the body breaks down food into forms that can be absorbed through the digestive system and then transported to each cell, which was on the other hand discussed in Grade 7 to be the basic unit of life. The learners have also discovered that cells divide to produce new cells by mitosis and meiosis. They have understood that meiosis is an early step in sexual reproduction that leads to variation. Students have been introduced to genetics to be able to appreciate evolutionary differences among species. Learners have also found out that biodiversity is the collective variety of species living in an ecosystem, and by studying the ecosystem; they have come across the various cycling of materials and energy transformation. DRAFT April 29, 2014 All modules in Grade 9 Unit 1-Living Things and Their Environment present student-centered activities that will allow the learners to discover and develop concepts that they may consider useful to their everyday life. At the end of each lesson, key concepts are provided for the students to grasp ideas and information that they will remember even after they have left school. Instructional activities are designed to build up the students’ knowledge, understanding, skills, and ability to transfer...

Words: 68324 - Pages: 274

Premium Essay

Probability

...Probability & Statistics for Engineers & Scientists This page intentionally left blank Probability & Statistics for Engineers & Scientists NINTH EDITION Ronald E. Walpole Roanoke College Raymond H. Myers Virginia Tech Sharon L. Myers Radford University Keying Ye University of Texas at San Antonio Prentice Hall Editor in Chief: Deirdre Lynch Acquisitions Editor: Christopher Cummings Executive Content Editor: Christine O’Brien Associate Editor: Christina Lepre Senior Managing Editor: Karen Wernholm Senior Production Project Manager: Tracy Patruno Design Manager: Andrea Nix Cover Designer: Heather Scott Digital Assets Manager: Marianne Groth Associate Media Producer: Vicki Dreyfus Marketing Manager: Alex Gay Marketing Assistant: Kathleen DeChavez Senior Author Support/Technology Specialist: Joe Vetere Rights and Permissions Advisor: Michael Joyce Senior Manufacturing Buyer: Carol Melville Production Coordination: Lifland et al. Bookmakers Composition: Keying Ye Cover photo: Marjory Dressler/Dressler Photo-Graphics Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and Pearson was aware of a trademark claim, the designations have been printed in initial caps or all caps. Library of Congress Cataloging-in-Publication Data Probability & statistics for engineers & scientists/Ronald E. Walpole . . . [et al.] — 9th ed. p. cm. ISBN 978-0-321-62911-1...

Words: 201669 - Pages: 807

Premium Essay

Logical Reasoning

...updated: April 26, 2016 Logical Reasoning Bradley H. Dowden Philosophy Department California State University Sacramento Sacramento, CA 95819 USA ii iii Preface Copyright © 2011-14 by Bradley H. Dowden This book Logical Reasoning by Bradley H. Dowden is licensed under a Creative Commons AttributionNonCommercial-NoDerivs 3.0 Unported License. That is, you are free to share, copy, distribute, store, and transmit all or any part of the work under the following conditions: (1) Attribution You must attribute the work in the manner specified by the author, namely by citing his name, the book title, and the relevant page numbers (but not in any way that suggests that the book Logical Reasoning or its author endorse you or your use of the work). (2) Noncommercial You may not use this work for commercial purposes (for example, by inserting passages into a book that is sold to students). (3) No Derivative Works You may not alter, transform, or build upon this work. An earlier version of the book was published by Wadsworth Publishing Company, Belmont, California USA in 1993 with ISBN number 0-534-17688-7. When Wadsworth decided no longer to print the book, they returned their publishing rights to the original author, Bradley Dowden. The current version has been significantly revised. If you would like to suggest changes to the text, the author would appreciate your writing to him at dowden@csus.edu. iv Praise Comments on the earlier 1993 edition...

Words: 189930 - Pages: 760

Free Essay

Industrial Engineering

...McGraw-Hill Create™ Review Copy for Instructor Espinoza. Not for distribution. Course BBE 4505 Omar Espinoza University Of Minnesota NATURAL RESOURCES McGraw-Hill Create™ Review Copy for Instructor Espinoza. Not for distribution. http://create.mcgraw-hill.com Copyright 2012 by The McGraw-Hill Companies, Inc. All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without prior written permission of the publisher. This McGraw-Hill Create text may include materials submitted to McGraw-Hill for publication by the instructor of this course. The instructor is solely responsible for the editorial content of such materials. Instructors retain copyright of these additional materials. ISBN-10: 1121789048 ISBN-13: 9781121789043 McGraw-Hill Create™ Review Copy for Instructor Espinoza. Not for distribution. Contents 1. Preface 1 2. Methods, Standards, and Work Design: Introduction 7 Problem-Solving Tools 27 3. Tex 29 4. Operation Analysis 79 5. Manual Work Design 133 6. Workplace, Equipment, and Tool Design 185 7. Work Environment Design 239 8. Design of Cognitive Work 281 9. Workplace and Systems Safety 327 10. Proposed Method Implementation 379 11. Time Study 413 12. Performance Rating and Allowances 447 13. Standard Data and Formulas 485 14. Predetermined Time Systems 507...

Words: 294686 - Pages: 1179

Free Essay

Comp Txt

...1 2 Acknowledgements p.1 tr ©iStockphoto.com/Dennys Bisogno, etc t = top, b = bottom, l = left, r = right, c = centre Computer hardware and software brand names mentioned in this book are protected by their respective trademarks and are acknowledged. Scratch is developed by the Lifelong Kindergarten Group at the MIT Media Lab. See http://scratch.mit.edu Every effort has been made to trace all copyright holders, but if any have been inadvertently overlooked the publishers will be pleased to make the necessary arrangements at the first opportunity. Although every effort has been made to ensure that website addresses are correct at time of going to press, Hodder Education cannot be held responsible for the content of any website mentioned in this book. It is sometimes possible to find a relocated web page by typing in the address of the home page for a website in the URL window of your browser. Photo credits p.1 © peno – Fotolia; p.15 © Dmitrydesigner/Fotolia; p.16 ©iStockphoto.com/Karl Yamashita; p.57 © Romanchuck – Fotolia; p.58 t © C Squared Studios/Photodisc/Getty Images, m ©Dmitriy Melnikov - Fotolia.com, b © Popova Olga/Fotolia; p.59 © picsfive – Fotolia; p.65 © Manfred Schmidt – Fotolia.com; p.67 © dja65 – Fotolia; p.68 © Konstantin Shevtsov – Fotolia; p.69 t © Miguel Navarro/Stone/Getty Images, b © Piero Cruciatti/Alamy; p.73 © Jamdesign/Fotolia; p.78 and 79 © adisa – Fotolia; p.81 © Mykola Mazuryk – Fotolia; p.82 t © Mauro Rodrigues/Fotolia...

Words: 49691 - Pages: 199

Free Essay

Physics

...SENIOR SECONDARY COURSE PHYSICS 1 (CORE MODULES) Coordinators Dr. Oum Prakash Sharma Sh. R.S. Dass NATIONAL INSTITUTE OF OPEN SCHOOLING A-25, INSTITUTIONAL AREA, SECTOR-62, NOIDA-201301 (UP) COURSE DESIGN COMMITTEE CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Maidan Garhi, Delhi MEMBERS Prof. A.R. Verma Former Director, National Physical Laboratory, Delhi, 160, Deepali Enclave Pitampura, Delhi-34 Dr. Naresh Kumar Reader (Rtd.) Deptt. of Physics Hindu College, D.U. Dr. Oum Prakash Sharma Asstt. Director (Academic) NIOS, Delhi Prof. L.S. Kothari Prof. of Physics (Retd.) Delhi University 71, Vaishali, Delhi-11008 Dr. Vajayshree Prof. of Physics IGNOU, Maidan Garhi Delhi Sh. R.S. Dass Vice Principal (Rtd.) BRMVB, Sr. Sec. School Lajpat Nagar, New Delhi-110024 Dr. G.S. Singh Prof. of Physics IIT Roorkee Sh. K.S. Upadhyaya Principal Jawahar Navodaya Vidyalaya Rohilla Mohammadabad (U.P.) Dr. V.B. Bhatia Prof. of Physics (Retd.) Delhi University 215, Sector-21, Faridabad COURSE DEVELOPMENT TEAM CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Delhi MEMBERS Prof. V.B. Bhatia 215, Sector-21, Faridabad Prof. B.B. Tripathi Prof. of Physics (Retd.), IIT Delhi 9-A, Awadhpuri, Sarvodaya Nagar Lucknow-226016 Sh. K.S. Upadhyaya Principal Navodaya Vidyalaya Rohilla Mohammadabad, (U.P.) Dr. V.P. Shrivastava Reader (Physics) D.E.S.M., NCERT, Delhi EDITORS TEAM CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Delhi MEMBERS Prof. B.B. Tripathi Prof...

Words: 131353 - Pages: 526

Free Essay

Osha Cabling Standars

...------------------------------------------------- Top of Form Bottom of Form This website is currently not being updated due to the suspension of Federal Government services. The last update to the site was October 1, 2013. Updates to the site will start again when the Federal Government resumes operations. If you need to report a workplace fatality, hospitalizations, an imminent danger situation, or you are filing a hazard complaint, please contact our toll free number: 1-800-321-OSHA (6742); TTY 1-877-889-5627 (or contact OSHA’s area and regional offices during normal business hours.) Federal Registers - Table of Contents | • Publication Date: | 02/14/2007 | • Publication Type: | Final Rules | • Fed Register #: | 72:7135-7221 | • Standard Number: | 1910 | • Title: | Electrical Standard; Final Rule | | | | [Federal Register: February 14, 2007 (Volume 72, Number 30)] [Rules and Regulations] [Page 7135-7221] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr14fe07-14] ----------------------------------------------------------------------- Part II Department of Labor ----------------------------------------------------------------------- Occupational Safety...

Words: 91983 - Pages: 368

Premium Essay

Manager

...Learning with Cases INTRODUCTION The case study method of teaching used in management education is quite different from most of the methods of teaching used at the school and undergraduate course levels. Unlike traditional lecture-based teaching where student participation in the classroom is minimal, the case method is an active learning method, which requires participation and involvement from the student in the classroom. For students who have been exposed only to the traditional teaching methods, this calls for a major change in their approach to learning. This introduction is intended to provide students with some basic information about the case method, and guidelines about what they must do to gain the maximum benefit from the method. We begin by taking a brief look at what case studies are, and how they are used in the classroom. Then we discuss what the student needs to do to prepare for a class, and what she can expect during the case discussion. We also explain how student performance is evaluated in a case study based course. Finally, we describe the benefits a student of management can expect to gain through the use of the case method. WHAT IS A CASE STUDY? There is no universally accepted definition for a case study, and the case method means different things to different people. Consequently, all case studies are not structured similarly, and variations abound in terms of style, structure and approach. Case material ranges from small caselets (a few paragraphs...

Words: 239776 - Pages: 960

Premium Essay

Geiziji

...FROM THE AUTHOR OF THE BESTSELLING BIOGRAPHIES OF BENJAMIN FRANKLIN AND ALBERT EINSTEIN, THIS IS THE EXCLUSIVE BIOGRAPHY OF STEVE JOBS. Based on more than forty interviews with Jobs conducted over two years—as well as interviews with more than a hundred family members, friends, adversaries, competitors, and colleagues—Walter Isaacson has written a riveting story of the roller-coaster life and searingly intense personality of a creative entrepreneur whose passion for perfection and ferocious drive revolutionized six industries: personal computers, animated movies, music, phones, tablet computing, and digital publishing. At a time when America is seeking ways to sustain its innovative edge, Jobs stands as the ultimate icon of inventiveness and applied imagination. He knew that the best way to create value in the twenty-first century was to connect creativity with technology. He built a company where leaps of the imagination were combined with remarkable feats of engineering. Although Jobs cooperated with this book, he asked for no control over what was written nor even the right to read it before it was published. He put nothing offlimits. He encouraged the people he knew to speak honestly. And Jobs speaks candidly, sometimes brutally so, about the people he worked with and competed against. His friends, foes, and colleagues provide an unvarnished view of the passions, perfectionism, obsessions, artistry, devilry, and compulsion for control that shaped his approach to business and...

Words: 233886 - Pages: 936

Premium Essay

Hiiiiiiiiiiiiii

...PHYSIC AL CONSTANTS CONSTANT Speed of light Elementary charge Electron mass Proton mass Gravitational constant Permeability constant Permittivity constant Boltzmann’s constant Universal gas constant Stefan–Boltzmann constant Planck’s constant Avogadro’s number Bohr radius SYMBOL c e me mp G m0 P0 k R s h 15 2p"2 NA a0 THREE-FIGURE VALUE 3.003108 m/s 1.60310219 C 9.11310231 kg 1.67310227 kg 6.67310211 N # m2/kg 2 1.2631026 N/A2 1H/m2 8.85310212 C 2/N # m2 1F/m2 1.38310223 J/K 8.31 J/K # mol 5.6731028 W/m2 # K4 6.63310234 J # s 6.0231023 mol21 5.29310211 m BEST KNOWN VALUE* 299 792 458 m/s (exact) 1.602 176 4871402 310219 C 9.109 382 151452 310231 kg 1.672 621 6371832 310227 kg 6.674 281672 310211 N # m2/kg 2 4p31027 (exact) 1/m0c2 (exact) 1.380 65041242 310223 J/K 8.314 4721152 J/K # mol 5.670 4001402 31028 W/m2 # K4 6.626 068 961332 310234 J # s 6.022 141 791302 31023 mol21 5.291 772 08591362 310211 m *Parentheses indicate uncertainties in last decimal places. Source: U.S. National Institute of Standards and Technology, 2007 values SI PREFIXES POWER 1024 1021 1018 1015 1012 109 106 103 102 101 100 1021 1022 1023 1026 1029 10212 10215 10218 10221 10224 THE GREEK ALPHABET PREFIX yotta zetta exa peta tera giga mega kilo hecto deca — deci centi milli micro nano pico femto atto zepto yocto SYMBOL Y Z E P T G M k h da — d c m μ n p f a z y Alpha ...

Words: 201181 - Pages: 805