Physics 2112 Unit 11


 Crystal Burns
 4 years ago
 Views:
Transcription
1 Physics 2112 Unit 11 Today s oncept: ircuits Unit 11, Slide 1
2 Stuff you asked about.. what happens when one resistor is in parallel and one is in series with the capacitor Differential equations are tough trickier than the last few prelectures difference between equations for charging and discharging. How much are we expected to know about all these equations. The time constant and exponential decay The concepts were pretty easy to understand. I feel like adding time into the mix will cause some confusion, but at this point in time (no pun intended) I understand the majority of it (minus the equations for the time dependent graphs. more explanation and examples please. conceptually it makes sense to me, but mathematically i'm a little confused. I need to see some example problems being worked out. Unit 11, Slide 2
3 Kirchoff s oltage ule q battery I 0 Differential Equation ircuit (harging) apacitor uncharged, Switch is moved to position a battery q dq dt 0 a battery b bat q dq dt 1 ( q ) q( t) 1 e t / I( t) I 0 e t / Unit 11, Slide 3
4 Question A circuit is wired up as shown below. The capacitor is initially uncharged and switched S1 and S2 are initially open. Then S1 is closed but S2 remains open. What are  o (voltage across immediately after)  f voltage across a long time after) A) o f B) o 0 f ) o 0 f < D) o f 0 S2 Unit 11, Slide 4
5 Question A circuit is wired up as shown below. The capacitor is initially uncharged and switched S1 and S2 are initially open. Then S1 is closed but S2 remains open. What are  I o (current into immediately after)  I f (current into a long time after) A) I o / I f / B) I o 0 I f / ) I o =/ I f 0 D) I o / I f < / S2 Unit 11, Slide 5
6 lose S 1 at t = 0 (leave S 2 open) 2 S1 S2 I I 0 Q/ 0 At t 0 At t big Unit 11, Slide 6
7 Question A circuit is wired up as shown below. The capacitor is initially uncharged and switched S1 and S2 are initially open. Then both S1 and S2 are closed at once. What are  o (voltage across immediately after)  f voltage across a long time after) A) o f B) o 0 f ) o 0 f < D) o f 0 S2 Unit 11, Slide 7
8 Example 11.1 (harging apacitor) 1 = 1uF 10 1 = 1.2MW What is the charge on the capacitor 1second after the switch is closed? What is the current through the resistor 1 second after the switch is closed? onceptual Idea: Use charging equations for a capacitor. Plan: Find time constant, t Find Q f and I o Put in t=1sec
9 Question (harging apacitor) 10 What is the charge on the capacitor 1second after the switch is closed? 1 = 1uF 1 = 1.2MW Based on what we now so far, what do you think the charge on the capacitor will be at t = 1sec? A) a little bit less than 0.37*10*1uF B) a little bit more than 0.37*10*1uF ) a little bit less than 0.63*10*1uF D) a little bit more than 0.63*10*1uF E) 0
10 Question (harging apacitor) 10 What is the charge on the capacitor 1second after the switch is closed? 1 = 1uF 1 = 1.2MW Based on what we now so far, what do you think the current through the resistor will be at t = 1sec? A) a little bit less than 0.37*10/1.2MW B) a little bit more than 0.37*10/1.2MW ) a little bit less than 0.63*10/1.2MW D) a little bit more than 0.63*10/1.2MW E) 0
11 Example 11.2 (harging apacitor) 1 = 1uF 10 1 = 1.2MW What is the charge on the capacitor 10 seconds after the switch is closed? What is the current through the resistor 10 seconds after the switch is closed? onceptual Idea: Use charging equations for a capactor. Plan: Find time constant, t Find Q f and I o Put in t=1sec
12 Question (harging apacitor) 10 What is the charge on the capacitor 10 second after the switch is closed? 1 = 1uF 1 = 1.2MW Based on what we now so far, what do you think the charge on the capacitor will be at t = 10sec? A) a little bit less than 10*1uF B) a little bit more than 10*1uF ) a little bit less than 0.63*10*1uF D) a little bit more than 0.63*10*1uF E) ~0
13 Question (harging apacitor) 10 What is the current into the capacitor 10 second after the switch is closed? 1 = 1uF 1 = 1.2MW Based on what we now so far, what do you think the current into the capacitor will be at t = 10sec? A) a little bit less than 10/1.2MW B) a little bit more than 10/1.2MW ) a little bit less than 0.63*10/1.2MW D) a little bit more than 0.63*10/1.2MW E) ~0
14 Question In the circuit to the left, after the switch is closed, the capacitor takes a certain amount of time t 1 to reach 63% of its full charge Q 1. What if the capacitor had been twice as big ( 2 =2* 1 ). What could you say about the final full charge and the time it will take to reach 63% of the maximum level? A. The final charge will be greater and the charging time will be greater. B. The final charge will be the same and the charging time will be greater.. The final charge will be less and the charging time will be greater. D. The final charge will be the greater and the charging time will be less. E. The final charge will be less and the charging time will be less.
15 Question In the circuit to the left, after the switch is closed, the capacitor takes a certain amount of time t 1 to reach 63% of its full charge Q 1. What if the resistor had been twice as big ( 2 =2* 1 ). What could you say about the final full charge and the time it will take to reach 63% of the maximum level? A. The final charge will be greater and the charging time will be greater. B. The final charge will be the same and the charging time will be greater.. The final charge will be less and the charging time will be greater. D. The final charge will be the greater and the charging time will be less. E. The final charge will be less and the charging time will be less.
16 ircuit (Discharging) apacitor has q 0, Switch is moved to position b Kirchoff s oltage ule q I 0 Differential Equation q dq dt dt dq Q 0 a battery battery b I q( t) q 0 e t / I( t) I 0 e t / Unit 11, Slide 16
17 Example 11.3 (Discharging apacitor) 1 = 1uF = 1.2MW The switch is held in position 1 for a long time and the capacitor becomes fully charged. It is then flipped to position 2. What is the charge on the capacitor 2 seconds after the switch is flipped? onceptual Idea: Use discharging equations for a capacitor. Plan: Find time constant, t Find Q o Put in t=2sec
18 Example 11.4 (A hallenge) S In this circuit, assume,, and i are known. initially uncharged and then switch S is closed. What is t c, the charging time constant? What is the charge on the capacitor at any time t? There s going to be A LOT of algebra. Let s find some: Limiting ases: Unit 11, Slide 18
19 Question I 1 S In this circuit, initially uncharged and then switch S is closed. Immediately after S is closed, what is I 1, the current through 1? ( A B D E 1 3 ) Why? Draw circuit just after S closed (knowing 0) 1 is in series with the parallel combination of 2 and 3 S Unit 11, Slide 19
20 Question S In this circuit, initially uncharged and then switch S is closed. After S has been closed for a long time, what is I, the current through? Why? A B After a long time in a static circuit, the current through any capacitor approaches 0! This means we edraw circuit with open circuit in middle leg I 1 I 0 3 Unit 11, Slide 20
21 Question S In this circuit, initially uncharged and then switch S is closed. After S has been closed for a long time, what is, the voltage across? A B D E Why? 3 I 3 (/( 1 3 )) I 2 I Unit 11, Slide 21
22 Example 11.4 (A hallenge) S 1 2 I 1 I 2 I got: t c In this circuit, assume,, and i are known. initially uncharged and then switch S is closed.  What is t c, the charging time constant?  What is the charge on the capacitor at any time t? onceptual Idea: Use Kirchhoff s Laws. Get equation that relates Q and dq/dt on capacitor. Plan: Use loops to find I 1 and I 2 in terms of Q,, and s. Note dq/dt = I 1 I 2 Separate variables and integrate to get Q(t) Take derivative to find I heck the limiting cases we just determined Q 1 (1 e 3 t / t 3 ) Unit 11, Slide 22
23 Prediction for Lab Bulb 2 S Bulb 1 What will happen after I close the switch? A) Both bulbs come on and stay on. B) Both bulbs come on but then bulb 2 fades out. ) Both bulbs come on but then bulb 1 fades out. D) Both bulbs come on and then both fade out. Unit 11, Slide 23
24 Prediction for Lab Bulb 2 S Bulb 1 Suppose the switch has been closed a long time. Now what will happen after we open the switch? A) Both bulbs come on and stay on. B) Both bulbs come on but then bulb 2 fades out. ) Both bulbs come on but then bulb 1 fades out. D) Both bulbs come on and then both fade out. Unit 11, Slide 24
25 How do Exponentials Work? Q( t) 0 Q e t Fraction of initial charge that remains Q( t) Q How many time constants worth of time that have elapsed t Unit 11, Slide 25
26 Q( t) Q Q( t) 0 Q e t Time constant: t The bigger t is, the longer it takes to get the same change t Unit 11, Slide 26
27 Question The two circuits shown below contain identical capacitors that hold the same charge at t=0. Which of the following statements best describes the charge remaining on the two capacitors for any time after t=0? A. Q 1 < Q 2 B. Q 1 > Q 2. Q 1 = Q 2 D. Q 1 < Q 2 at first but then Q 1 > Q 2 after long time E. Q 1 < Q 2 at first but then Q 1 > Q 2 after long time Unit 11, Slide 27
Physics 212. Lecture 11. RC Circuits. Change in schedule Exam 2 will be on Thursday, July 12 from 8 9:30 AM. Physics 212 Lecture 11, Slide 1
Physics 212 Lecture 11 ircuits hange in schedule Exam 2 will be on Thursday, July 12 from 8 9:30 AM. Physics 212 Lecture 11, Slide 1 ircuit harging apacitor uncharged, switch is moved to position a Kirchoff
More informationYour Comments. THIS IS SOOOO HARD. I get the concept and mathematical expression. But I do not get links among everything.
Your omments THIS IS SOOOO HAD. I get the concept and mathematical expression. But I do not get links among everything. ery confusing prelecture especially what happens when switches are closed/opened
More informationDirectCurrent Circuits. Physics 231 Lecture 61
DirectCurrent Circuits Physics 231 Lecture 61 esistors in Series and Parallel As with capacitors, resistors are often in series and parallel configurations in circuits Series Parallel The question then
More informationPhysics 2112 Unit 19
Physics 11 Unit 19 Today s oncepts: A) L circuits and Oscillation Frequency B) Energy ) RL circuits and Damping Electricity & Magnetism Lecture 19, Slide 1 Your omments differential equations killing me.
More informationYour Comments. If the dialectic capacitor has less potential energy, why do we use dielectrics in capacitors??? Isn't the point to store energy?
Your omments I thin this was easier than normal. I felt really good about the capacitance characteristics, although not quite as much about charge and other factors. The most confusing part was the different
More informationPhysics 212. Lecture 8. Today's Concept: Capacitors. Capacitors in a circuits, Dielectrics, Energy in capacitors. Physics 212 Lecture 8, Slide 1
Physics 212 Lecture 8 Today's oncept: apacitors apacitors in a circuits, Dielectrics, Energy in capacitors Physics 212 Lecture 8, Slide 1 Simple apacitor ircuit Q +Q Q Q= Q Battery has moved charge Q
More informationProblem Solving 8: Circuits
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics OBJECTIVES Problem Solving 8: Circuits 1. To gain intuition for the behavior of DC circuits with both resistors and capacitors or inductors.
More informationConcept Question: Capacitors
oncept Question: apacitors Three identical capacitors are connected to a battery. The battery is then disconnected. A How do the charge on A, B & compare before and after the battery B is removed? BEFOE;
More informationPhysics 2112 Unit 20. Outline: Driven AC Circuits Phase of V and I Conceputally Mathematically With phasors
Physics 2112 Unit 20 Outline: Driven A ircuits Phase of V and I onceputally Mathematically With phasors Electricity & Magnetism ecture 20, Slide 1 Your omments it just got real this stuff is confusing
More informationPhysics 2112 Unit 18
Physics 2112 Unit 18 Today s Concepts: A) Induction B) Circuits Electricity & Magnetism ecture 18, Slide 1 Where we are.. Just finished introducing magnetism Will now apply magnetism to AC circuits Unit
More informationCircuits. 1. The Schematic
+ ircuits 1. The Schematic 2. Power in circuits 3. The Battery 1. eal Battery vs. Ideal Battery 4. Basic ircuit nalysis 1. oltage Drop 2. Kirchoff s Junction Law 3. Series & Parallel 5. Measurement Tools
More informationChapter 28. Direct Current Circuits
Chapter 28 Direct Current Circuits Circuit Analysis Simple electric circuits may contain batteries, resistors, and capacitors in various combinations. For some circuits, analysis may consist of combining
More informationYour Comments. I have three midterms this week; specifically, two tomorrow. I am studying for chemistry and calculus tonight.
Your Comments I wish we had a day off for exams that would be fantastic WE SHOULD NOT HAE HAD CLASS TODAY!!!!! BOOOOOOOo!!! I have three midterms this week; specifically, two tomorrow. I am studying for
More informationClicker Session Currents, DC Circuits
Clicker Session Currents, DC Circuits Wires A wire of resistance R is stretched uniformly (keeping its volume constant) until it is twice its original length. What happens to the resistance? 1) it decreases
More informationCurrent. I = ei e = en e Av d. The current, which is Coulomb s per second, is simply
Current The current, which is Coulomb s per second, is simply I = ei e = en e Av d e is the charge is the electron! ne is the density of electrons! A is the cross sectional area of the wire! vd is the
More informationElectricity & Magnetism Lecture 8: Capacitors
Electricity & Magnetism Lecture 8: apacitors Today s oncept: apacitors (apacitors in a circuits, Dielectrics, Energy in capacitors) Alternate terms: condensors, capacitators,... Electricity & Magne/sm
More informationPhysics Tutorial  Currents and Circuits
Question 1: Ion Channels Physics Tutorial  Currents and Circuits The biochemistry that takes place inside cells depends on various elements that are dissolved in water as ions. The ions enter cells through
More informationYour Comments. Seems interesting, but my mind is on the test right now.
Your omments Pretty straightforward! The analogy to spring motion really helped. Is there any false comparison with it that we should watch out for? I think I got a lot of this, the prelecture confused
More informationPhysics 142 Steady Currents Page 1. Steady Currents
Physics 142 Steady Currents Page 1 Steady Currents If at first you don t succeed, try, try again. Then quit. No sense being a damn fool about it. W.C. Fields Electric current: the slow average drift of
More informationPower lines. Why do birds sitting on a highvoltage power line survive?
Power lines At large distances, the resistance of power lines becomes significant. To transmit maximum power, is it better to transmit high V, low I or high I, low V? (a) high V, low I (b) low V, high
More informationLab 5 RC Circuits. What You Need To Know: Physics 212 Lab
Lab 5 R ircuits What You Need To Know: The Physics In the previous two labs you ve dealt strictly with resistors. In today s lab you ll be using a new circuit element called a capacitor. A capacitor consists
More informationPhysics 115. General Physics II. Session 24 Circuits Series and parallel R Meters Kirchoff s Rules
Physics 115 General Physics II Session 24 Circuits Series and parallel R Meters Kirchoff s Rules R. J. Wilkes Email: phy115a@u.washington.edu Home page: http://courses.washington.edu/phy115a/ 5/15/14 Phys
More informationLab 5 RC Circuits. What You Need To Know: Physics 212 Lab
Lab 5 R ircuits What You Need To Know: The Physics In the previous two labs you ve dealt strictly with resistors. In today s lab you ll be using a new circuit element called a capacitor. A capacitor consists
More informationPhysics 102: Lecture 7 RC Circuits
Physics 102: Lecture 7 C Circuits Physics 102: Lecture 7, Slide 1 C Circuits Circuits that have both resistors and capacitors: K Na Cl C ε K ε Na ε Cl S With resistance in the circuits, capacitors do not
More informationCourse Updates.
Course Updates http://www.phys.hawaii.edu/~varner/phys272spr10/physics272.html Notes for today: 1) Chapter 26 this week (DC, C circuits) 2) Assignment 6 (Mastering Physics) online and separate, written
More informationC R. Consider from point of view of energy! Consider the RC and LC series circuits shown:
ircuits onsider the R and series circuits shown: ++++  R ++++  Suppose that the circuits are formed at t with the capacitor charged to value. There is a qualitative difference in the time development
More informationChapter 6 DIRECT CURRENT CIRCUITS. Recommended Problems: 6,9,11,13,14,15,16,19,20,21,24,25,26,28,29,30,31,33,37,68,71.
Chapter 6 DRECT CURRENT CRCUTS Recommended Problems: 6,9,,3,4,5,6,9,0,,4,5,6,8,9,30,3,33,37,68,7. RESSTORS N SERES AND N PARALLEL  N SERES When two resistors are connected together as shown we said that
More informationChapter 26 DirectCurrent Circuits
Chapter 26 DirectCurrent Circuits 1 Resistors in Series and Parallel In this chapter we introduce the reduction of resistor networks into an equivalent resistor R eq. We also develop a method for analyzing
More informationLaboratory 7: Charging and Discharging a Capacitor Prelab
Phys 132L Fall 2018 Laboratory 7: Charging and Discharging a Capacitor Prelab Consider a capacitor with capacitance C connected in series to a resistor with resistance R as shown in Fig. 1. Theory predicts
More informationExam 3PHYS 102S14
Name: Exam 3PHYS 102S14 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of these statements is always true? a. resistors in parallel have the
More information2005 AP PHYSICS C: ELECTRICITY AND MAGNETISM FREERESPONSE QUESTIONS
2005 AP PHYSICS C: ELECTRICITY AND MAGNETISM In the circuit shown above, resistors 1 and 2 of resistance R 1 and R 2, respectively, and an inductor of inductance L are connected to a battery of emf e and
More informationYour comments. Having taken ece 110 made it easy for me to grasp most of the concepts.
Your comments Having taken ece 110 made it easy for me to grasp most of the concepts. God I can go to bed now. Oh wait I can't cuz EXAM??!?!!111 I know that this course has to move at a fast pace and that
More informationLecture 39. PHYC 161 Fall 2016
Lecture 39 PHYC 161 Fall 016 Announcements DO THE ONLINE COURSE EVALUATIONS  response so far is < 8 % Magnetic field energy A resistor is a device in which energy is irrecoverably dissipated. By contrast,
More informationChapter 26 DirectCurrent Circuits
Chapter 26 DirectCurrent Circuits 1 Resistors in Series and Parallel In this chapter we introduce the reduction of resistor networks into an equivalent resistor R eq. We also develop a method for analyzing
More informationConcepTest PowerPoints
ConcepTest PowerPoints Chapter 19 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for
More informationChapter 19 Lecture Notes
Chapter 19 Lecture Notes Physics 2424  Strauss Formulas: R S = R 1 + R 2 +... C P = C 1 + C 2 +... 1/R P = 1/R 1 + 1/R 2 +... 1/C S = 1/C 1 + 1/C 2 +... q = q 0 [1e t/(rc) ] q = q 0 e t/(rc τ = RC
More informationSPS Presents: A Cosmic Lunch!
SPS Presents: A Cosmic Lunch! Who: Dr. Brown will be speaking about Evolution of the Elements: from Periodic table to Standard Model and Beyond! When: October 7 th at am Where: CP 79 (by the front office)
More informationVersion 001 CIRCUITS holland (1290) 1
Version CIRCUITS holland (9) This printout should have questions Multiplechoice questions may continue on the next column or page find all choices before answering AP M 99 MC points The power dissipated
More informationDirectCurrent Circuits
DirectCurrent Circuits A'.3/.". 39 ' )232./ 32,+/" 7+3(5.)232./ 7 3244)'03,.5B )*+," &'&./( 01*234 352567+ *7 2829*4& )"< 35 )*+,"= 94 3563 A0.5.C2/'231).D')232.')21 < /633">&@5:836+0"1464625"4*43"
More informationElectricity & Magnetism Lecture 18
Electricity & Magnetism ecture 18 Today s Concepts: A) Induc4on B) R Circuits Electricity & Magne4sm ecture 18, Slide 1 Stuff you said.. Will there be more lab ac4vi4es involving oscilloscopes? Unlike
More informationCollege Physics II Lab 8: RC Circuits
INTODUTION ollege Physics II Lab 8: ircuits Peter olnick with Taner Edis Spring 2019 Introduction onsider the circuit shown. (onsult section 23.7 in your textbook.) If left for long enough, the charge
More informationLABORATORY 4 ELECTRIC CIRCUITS I. Objectives
LABORATORY 4 ELECTRIC CIRCUITS I Objectives to be able to discuss potential difference and current in a circuit in terms of electric field, work per unit charge and motion of charges to understand that
More informationKirchhoff's Laws I 2 I 3. junc. loop. loop IR +IR 2 2 V P I V I R R R R R C C C. eff R R R C C C. eff 3.0
V Kirchhoff's Laws junc j 0 1 2 3  V + +V  + loop V j 0 2 2 V P V  + loop eff 1 2 1 1 1 eff 1 2 1 1 1 C C C eff C C C eff 1 2 1 2 3.0 Charges in motion Potential difference V + E Metal wire crosssection
More informationTactics Box 23.1 Using Kirchhoff's Loop Law
PH203 Chapter 23 solutions Tactics Box 231 Using Kirchhoff's Loop Law Description: Knight/Jones/Field Tactics Box 231 Using Kirchhoff s loop law is illustrated Learning Goal: To practice Tactics Box 231
More informationLecture 12 Chapter 28 RC Circuits Course website:
Lecture 12 Chapter 28 RC Circuits Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Today we are going to discuss: Chapter 28: Section 28.9 RC circuits Steady current Timevarying
More informationGeneral Physics  E&M (PHY 1308)  Lecture Notes. General Physics  E&M (PHY 1308) Lecture Notes
General Physics  E&M (PHY 1308) Lecture Notes Lecture 014: RC Circuits and Magnetism SteveSekula, 21 March 2011 (created 7 March 2011) Capacitors in Circuits no tags What happens if we add a capacitor
More informationInductance. Slide 2 / 26. Slide 1 / 26. Slide 4 / 26. Slide 3 / 26. Slide 6 / 26. Slide 5 / 26. Mutual Inductance. Mutual Inductance.
Slide 1 / 26 Inductance 2011 by Bryan Pflueger Slide 2 / 26 Mutual Inductance If two coils of wire are placed near each other and have a current passing through them, they will each induce an emf on one
More informationLecture 7: September 19th, The following slides were derived from those prepared by Professor Oldham for EE40 in Fall 01. Version Date 9/19/01
EES Intro. electronics for S Fall Lecture 7: September 9th, Lecture 7: 9/9/ A.. Neureuther Version Date 9/9/ harging and Discharging of ircuits (Transients) A) Mathematical Method B) EE Easy Method ) Logic
More informationPhysics 240 Fall 2005: Exam #3. Please print your name: Please list your discussion section number: Please list your discussion instructor:
Physics 240 Fall 2005: Exam #3 Please print your name: Please list your discussion section number: Please list your discussion instructor: Form #1 Instructions 1. Fill in your name above 2. This will be
More informationSwitch. R 5 V Capacitor. ower upply. Voltmete. Goals. Introduction
Switch Lab 6. Circuits ower upply Goals + + R 5 V Capacitor V To appreciate the capacitor as a charge storage device. To measure the voltage across a capacitor as it discharges through a resistor, and
More informationPhysics 248, Spring 2009 Lab 7: Capacitors and RCDecay
Name Section Physics 248, Spring 2009 Lab 7: Capacitors and RCDecay Your TA will use this sheet to score your lab. It is to be turned in at the end of lab. To receive full credit you must use complete
More informationChapter 7 DirectCurrent Circuits
Chapter 7 DirectCurrent Circuits 7. Introduction... 7. Electromotive Force... 7.3 Resistors in Series and in Parallel... 4 7.4 Kirchhoff s Circuit Rules... 6 7.5 VoltageCurrent Measurements... 8 7.6
More informationAgenda for Today. Elements of Physics II. Resistance Resistors Series Parallel Ohm s law Electric Circuits. Current Kirchoff s laws
Resistance Resistors Series Parallel Ohm s law Electric Circuits Physics 132: Lecture e 17 Elements of Physics II Current Kirchoff s laws Agenda for Today Physics 201: Lecture 1, Pg 1 Clicker Question
More informationPhysics 2135 Exam 2 October 20, 2015
Exam Total / 200 Physics 2135 Exam 2 October 20, 2015 Printed Name: Rec. Sec. Letter: Five multiple choice questions, 8 points each. Choose the best or most nearly correct answer. 1. A straight wire segment
More informationphysics 4/7/2016 Chapter 31 Lecture Chapter 31 Fundamentals of Circuits Chapter 31 Preview a strategic approach THIRD EDITION
Chapter 31 Lecture physics FOR SCIENTISTS AND ENGINEERS a strategic approach THIRD EDITION randall d. knight Chapter 31 Fundamentals of Circuits Chapter Goal: To understand the fundamental physical principles
More informationCourse Updates. Reminders: 1) Assignment #10 due Today. 2) Quiz # 5 Friday (Chap 29, 30) 3) Start AC Circuits
ourse Updates http://www.phys.hawaii.edu/~varner/phys272spr10/physics272.html eminders: 1) Assignment #10 due Today 2) Quiz # 5 Friday (hap 29, 30) 3) Start A ircuits Alternating urrents (hap 31) In this
More informationCapacitors. Example 1
Physics 30AP Resistors and apacitors I apacitors A capacitor is a device for storing electrical charge that consists of two conducting objects placed near one another but not touching. A A typical capacitor
More informationCHEM*3440. Current Convention. Charge. Potential Energy. Chemical Instrumentation. Rudimentary Electronics. Topic 3
urrent onvention HEM*3440 hemical nstrumentation Topic 3 udimentary Electronics ONENTON: Electrical current flows from a region of positive potential energy to a region of more negative (or less positive)
More informationElectricity. Part 1: Static Electricity
Electricity Part 1: Static Electricity Introduction: Atoms Atoms are made up of charged particles. Atoms are made of 3 subatomic particles: Electrons protons, electrons and neutrons. Protons () Charge
More informationPHYS 1102 EXAM  II. SECTION: (Circle one) 001 (TH 9:30 AM to 10:45AM) 002 (TH 3:30 PM to 4:45 PM) You have 1 hr 45 minutes to complete the test
PHYS 1102 EXAM  II SECTION: (Circle one) 001 (TH 9:30 AM to 10:45AM) 002 (TH 3:30 PM to 4:45 PM) Your Name: Student ID: You have 1 hr 45 minutes to complete the test PLEASE DO NOT START TILL YOU ARE INSTRUCTED
More informationExperiment 8: Capacitance and the Oscilloscope
Experiment 8: Capacitance and the Oscilloscope Nate Saffold nas2173@columbia.edu Office Hour: Mondays, 5:30PM6:30PM @ Pupin 1216 INTRO TO EXPERIMENTAL PHYSLAB 1493/1494/2699 Outline Capacitance: Capacitor
More informationMasteringPhysics: Assignment Print View. Problem 30.50
Page 1 of 15 Assignment Display Mode: View Printable Answers phy260s08 homework 13 Due at 11:00pm on Wednesday, May 14, 2008 View Grading Details Problem 3050 Description: A 15cmlong nichrome wire is
More informationSwitch. R 5 V Capacitor. ower upply. Voltmete. Goals. Introduction
Switch Lab 9. Circuits ower upply Goals + + R 5 V Capacitor V To appreciate the capacitor as a charge storage device. To measure the voltage across a capacitor as it discharges through a resistor, and
More informationDC Circuits. Electromotive Force Resistor Circuits. Kirchoff s Rules. RC Circuits. Connections in parallel and series. Complex circuits made easy
DC Circuits Electromotive Force esistor Circuits Connections in parallel and series Kirchoff s ules Complex circuits made easy C Circuits Charging and discharging Electromotive Force (EMF) EMF, E, is the
More informationR R V I R. Conventional Current. Ohms Law V = IR
DC Circuits opics EMF and erminal oltage esistors in Series and in Parallel Kirchhoff s ules EMFs in Series and in Parallel Capacitors in Series and in Parallel Ammeters and oltmeters Conventional Current
More informationPH 2222C Fall Circuits. Lectures Chapter 27 (Halliday/Resnick/Walker, Fundamentals of Physics 8 th edition)
PH 2222C Fall 2012 Circuits Lectures 1112 Chapter 27 (Halliday/Resnick/Walker, Fundamentals of Physics 8 th edition) 1 Chapter 27 Circuits In this chapter we will cover the following topics: Electromotive
More information2. In words, what is electrical current? 3. Try measuring the current at various points of the circuit using an ammeter.
PS 12b Lab 1a Fun with Circuits Lab 1a Learning Goal: familiarize students with the concepts of current, voltage, and their measurement. Warm Up: A.) Given a light bulb, a battery, and single copper wire,
More informationConcepTest Clicker Questions. Chapter 26 Physics: for Scientists & Engineers with Modern Physics, 4th edition Giancoli
ConcepTest Clicker Questions Chapter 26 Physics: for Scientists & Engineers with Modern Physics, 4th edition Giancoli 2008 Pearson Education, Inc. This work is protected by United States copyright laws
More information4 Electric circuits. Serial and parallel resistors V 3 V 2 V Serial connection of resistors:
4 lectric circuits PHY67 Spring 006 Serial and parallel resistors Serial connection of resistors: As the current I through each of serially connected resistors is the same, one can use Ohm s law and write...
More informationCopyright 2008 Pearson Education, Inc., publishing as Pearson AddisonWesley.
Surprising as it may seem, the power of a computer is achieved simply by the controlled flow of charges through tiny wires and circuit elements. Chapter Goal: To understand the fundamental physical principles
More informationPhys 102 Lecture 9 RC circuits
Phys 102 Lecture 9 RC circuits 1 Recall from last time... We solved various circuits with resistors and batteries (also capacitors and batteries) ε R 1 R 2 R 3 R 1 ε 1 ε 2 R 3 What about circuits that
More informationElectricity and Magnetism DC Circuits ResistanceCapacitance Circuits
Electricity and Magnetism DC Circuits ResistanceCapacitance Circuits Lana Sheridan De Anza College Feb 12, 2018 Last time using Kirchhoff s laws Overview two Kirchhoff trick problems resistancecapacitance
More informationPhysics 220: Worksheet 7
(1 A resistor R 1 =10 is connected in series with a resistor R 2 =100. A current I=0.1 A is present through the circuit. What is the power radiated in each resistor and also in the total circuit? (2 A
More informationP114 University of Rochester NAME S. Manly Spring 2010
Exam 2 (March 23, 2010) Please read the problems carefully and answer them in the space provided. Write on the back of the page, if necessary. Show your work where indicated. Problem 1 ( 8 pts): In each
More informationElectricity & Optics
Physics 241 Electricity & Optics Lecture 12 Chapter 25 sec. 6, 26 sec. 1 Fall 217 Semester Professor Koltick Circuits With Capacitors C Q = C V V = Q C + V R C, Q Kirchhoff s Loop Rule: V I R V = V I R
More informationENERGY AND TIME CONSTANTS IN RC CIRCUITS By: Iwana Loveu Student No Lab Section: 0003 Date: February 8, 2004
ENERGY AND TIME CONSTANTS IN RC CIRCUITS By: Iwana Loveu Student No. 416 614 5543 Lab Section: 0003 Date: February 8, 2004 Abstract: Two charged conductors consisting of equal and opposite charges forms
More informationExperiment 4. RC Circuits. Observe and qualitatively describe the charging and discharging (decay) of the voltage on a capacitor.
Experiment 4 RC Circuits 4.1 Objectives Observe and qualitatively describe the charging and discharging (decay) of the voltage on a capacitor. Graphically determine the time constant τ for the decay. 4.2
More informationCh 28DC Circuits! 1.) EMF & Terminal Voltage! 9.0 V 8.7 V 8.7 V. V =! " Ir. Terminal Open circuit internal! voltage voltage (emf) resistance" 2.
Ch 28DC Circuits! 1.) EMF & Terminal Voltage! 9.0 V 8.7 V 8.7 V V =! " Ir Terminal Open circuit internal! voltage voltage (emf) resistance" 2.) Resistors in series! One of the bits of nastiness about
More informationDirect Current (DC) Circuits
Direct Current (DC) Circuits NOTE: There are short answer analysis questions in the Participation section the informal lab report. emember to include these answers in your lab notebook as they will be
More informationSwitch. R 5 V Capacitor. ower upply. Voltmete. Goals. Introduction
Switch Lab 6. Circuits ower upply Goals + + R 5 V Capacitor V To appreciate the capacitor as a charge storage device. To measure the voltage across a capacitor as it discharges through a resistor, and
More informationRC Circuits. Lecture 13. Chapter 31. Physics II. Course website:
Lecture 13 Chapter 31 Physics II RC Circuits Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Lecture Capture: http://echo360.uml.edu/danylov201415/physics2spring.html Steady current
More informationRC Circuits. Equipment: Capstone with 850 interface, RLC circuit board, 2 voltage sensors (no alligator clips), 3 leads V C = 1
R ircuits Equipment: apstone with 850 interface, RL circuit board, 2 voltage sensors (no alligator clips), 3 leads 1 Introduction The 3 basic linear circuits elements are the resistor, the capacitor, and
More informationElectrical measurements:
Electrical measurements: Last time we saw that we could define circuits though: current, voltage and impedance. Where the impedance of an element related the voltage to the current: This is Ohm s law.
More informationChapter 19. Electric Current, Resistance, and DC Circuit Analysis
Chapter 19 Electric Current, Resistance, and DC Circuit Analysis I = dq/dt Current is charge per time SI Units: Coulombs/Second = Amps Direction of Electron Flow _ + Direction of Conventional Current:
More informationPhysics Investigation 10 Teacher Manual
Physics Investigation 10 Teacher Manual Observation When a light bulb is connected to a number of charged capacitors, it lights up for different periods of time. Problem What does the rate of discharging
More information5. In parallel V 1 = V 2. Q 1 = C 1 V 1 and Q 2 = C 2 V 2 so Q 1 /Q 2 = C 1 /C 2 = 1.5 D
NSWRS  P Physics Multiple hoice Practice ircuits Solution nswer 1. The resistances are as follows: I:, II: 4, III: 1, IV:. The total resistance of the 3 and 6 in parallel is making the total circuit resistance
More informationPhysics 240 Fall 2005: Exam #3 Solutions. Please print your name: Please list your discussion section number: Please list your discussion instructor:
Physics 4 Fall 5: Exam #3 Solutions Please print your name: Please list your discussion section number: Please list your discussion instructor: Form #1 Instructions 1. Fill in your name above. This will
More informationClass 8. Resistivity and Resistance Circuits. Physics 106. Winter Press CTRLL to view as a slide show. Class 8. Physics 106.
and Circuits and Winter 2018 Press CTRLL to view as a slide show. Last time we learned about Capacitance Problems ParallelPlate Capacitors Capacitors in Circuits Current Ohm s Law and Today we will learn
More informationRC Circuits. RC Circuits: Charging a Capacitor
Circuits http://www.allthingsphotography.com/wpcontent/uploads/2014/01/flashbasics.jpg Circuits: Charging a Capacitor C initially uncharged Connect switch at t = 0 Calculate current and charge as function
More informationCapacitors GOAL. EQUIPMENT. CapacitorDecay.cmbl 1. Building a Capacitor
PHYSICS EXPERIMENTS 133 Capacitor 1 Capacitors GOAL. To measure capacitance with a digital multimeter. To make a simple capacitor. To determine and/or apply the rules for finding the equivalent capacitance
More informationPhysics 126 Fall 2004 Practice Exam 1. Answer will be posted about Oct. 5.
Physics 126 Fall 2004 Practice Exam 1. Answer will be posted about Oct. 5. 1. Which one of the following statements best explains why tiny bits of paper are attracted to a charged rubber rod? A) Paper
More informationChapter 28 Direct Current Circuits
Chapter 28 Direct Current Circuits Multiple Choice 1. t what rate is thermal energy being generated in the 2resistor when = 12 V and = 3.0 Ω? 2 a. 12 W b. 24 W c. 6.0 W d. 3.0 W e. 1.5 W 2. t what rate
More informationChapter 30 Self Inductance, Inductors & DC Circuits Revisited
Chapter 30 Self Inductance, Inductors & DC Circuits Revisited SelfInductance and Inductors Self inductance determines the magnetic flux in a circuit due to the circuit s own current. B = LI Every circuit
More informationUniversity of Maryland Department of Physics
Spring 2002 University of Maryland Department of Physics Laura Lising Physics 122 April 24, 2003 Exam #2 Solutions Multiple choice questions. Just the answer counts for these. (8 points each) 1) Suppose
More informationTransient response of RC and RL circuits ENGR 40M lecture notes July 26, 2017 ChuanZheng Lee, Stanford University
Transient response of C and L circuits ENG 40M lecture notes July 26, 2017 ChuanZheng Lee, Stanford University esistor capacitor (C) and resistor inductor (L) circuits are the two types of firstorder
More informationCapacitance. A capacitor consists of two conductors that are close but not touching. A capacitor has the ability to store electric charge.
Capacitance A capacitor consists of two conductors that are close but not touching. A capacitor has the ability to store electric charge. a) Parallelplate capacitor connected to battery. (b) is a circuit
More informationDiscussion Question 7A P212, Week 7 RC Circuits
Discussion Question 7A P1, Week 7 RC Circuits The circuit shown initially has the acitor uncharged, and the switch connected to neither terminal. At time t = 0, the switch is thrown to position a. C a
More informationIntroduction. Prelab questions: Physics 1BL KIRCHOFF S RULES Winter 2010
Introduction In this lab we will examine more complicated circuits. First, you will derive an expression for equivalent resistance using Kirchhoff s Rules. Then you will discuss the physics underlying
More informationChapter 26 & 27. Electric Current and Direct Current Circuits
Chapter 26 & 27 Electric Current and Direct Current Circuits Electric Current and Direct Current Circuits Current and Motion of Charges Resistance and Ohm s Law Energy in Electric Circuits Combination
More informationReview. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
Review Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. When more devices are added to a series circuit, the total circuit resistance: a.
More information