Lab 3 dc circuits and ohms law introduction during the nineteenth century so many advances were made in understanding the electrical nature of matter that it has been called the age of electricity. Questions and answers lecture notes, lectures 110 summary biology. February 12, 2019 hopefully you remember how to find the resistance of an object by measuring the voltage and current from last lab. Look up formulas for the equivalent resistance of resistors in series and parallel, and write them down in your lab notebook. Sep 05, 2017 i performed a lab on resistors in series the other day, and i believe my data is incorrect.
In this lab we will measure and analyze currents and voltages for circuits. Resistors in series and parallel physics lab report. Identify series and parallel resistors in a circuit setting if youre seeing this message, it means were having trouble loading external resources on our website. Series and parallel resistors recently, we did a lab where we constructed a circuit with two 1 k. Jul 11, 2010 in parallel connection, two or more resistors are joined at both of their ends. Feb 15, 2009 recently, we did a lab where we constructed a circuit with two 1 k. Resistors in series and parallel resistor combinations. Resistors in series and parallel connections fau studocu. Emt 1150 lab professor aparicio carranza electrical circuits.
Series and parallel resistors practice khan academy. Resistors can be connected together in an unlimited number of series and parallel combinations to form complex resistive circuits. In the previous tutorials we have learnt how to connect individual resistors together to form either a series resistor network or a parallel resistor network and we used ohms law to find the various currents flowing. The purpose of this experiment is to explore the relationship between voltage and current in networks of resistors connected in series and in parallel by constructing 6 simple circuits. This is needed in a circuit to start the electrons moving. The equivalent resistance rp of r1 and r2 in parallel. Series and parallel resistors california state university. For one part of the lab we used two 100 ohm resistors in series and measured the following. Note that the resistors are connected to each other at two points. Series and parallel circuits objectives to study current flow and voltages in series and parallel circuits. Series and parallel connections the objectives of this lab are. View lab report lab 2 report resistors in series and in parallel from phys a125 at orange coast college. What do you think would happen if you connected the voltmeter in series in the circuit.
In our previous post about resistors, we studied about different types of resistors. Resistors in series and parallel introductionabstract in this experiment, i used resistors. Resistors in series and parallel introductionabstract in this experiment, i used resistors in parallel and in series, and i also calculated the total resistance of an electric circuit. I also used the ohms law to determine the calculated values and compare. If youre behind a web filter, please make sure that the domains.
Lab 4 resistors in series and parallel introduction\abstract in this. Ncert class 10 science lab manual resistors in parallel class 10 physics practical introduction. Oct 07, 2015 resistors in series and parallel combinations. General physics iii lab page 1 of 6 pcccascade experiment. To check the results of connecting series and parallel resistors kcl its a fundamental law that manifestation of the conservation of matter charges, and it says that the sum of currents. In this experiment, we could learn the difference between resistors in series and parallel. Calculate currents, voltage drops, and equivalent resistances in series and parallel circuits. An electrical circuit is a network that has a closed loop, giving a return path for the current. Lab 4 resistors in series and parallel introduction. This is from a physics lab report on voltage and c.
To use ohms law to calculate equivalent resistance of series and parallel circuits. Principles the electrical current i flowing through a device such as a resistor with resistance r is defined as the amount of charge q flowing through the device per unit time. In this experiment, you will construct circuits using multiple resistors. To check kirchhoffs current law kcl from previous lab 2. Use a multimeter to measure resistance, dc voltage, and current. Report lab 1 series and parallel circuits resistor scribd. Learn parallel circuits with free interactive flashcards. Resistor circuits quiz resistor networks calculation practice for each circuit, calculate the total resistance of the network. Jan 09, 2017 mr habgood shows you how to measure the total resistance of resistors in series and parallel. You may just need to show the resulting document on the lab computer, or the instructor may also ask for additional analysis, including a more comprehensive lab.
When two resistors are in series, they have the same current running through them. As resistors are added in series to a circuit, the total resistance will. Two resistors in series a circuit having two resistors r1 and r2 in series is indicated below. Resistors are in parallel if their terminals are connected to the same two nodes. Three resistors r1, r2, and r3 connected in series. Insert the wires of these leads into the circuit board across the three resistors in series with the two multimeters set to voltage v and current a as shown in the figures 6 and 7. Basically virtual lab for the two main types of circuit. Ohm discovered that the ratio of voltage to current in a metallic resistor is constant as long as the temperature is held constant. Dec 11, 2017 this physics video tutorial provides a basic introduction into dc circuits. Work out your answers with pencil, paper and calculator. Theory in the previous experiment, you constructed 4 circuits, each circuit built with one resistive element.
Resistors in series and parallel combinations electronics post. And we can see the relationship of the resistances, current and voltage in circuit which related to ohms law. Copy your spreadsheet results and paste them into the document. Explain why total resistance of a parallel circuit is less than the smallest. From our measurementsdata, how do i know that our circuit gives the correct value of the resistance. Examine the circuit diagram to make this assessment. Determine the resistance of the resistors by colour coding. Consider the resistors are connected in series ahow are the voltage drops across the individual resistors related to the. Lab 4 series and parallel resistors physics 212 lab what you need to know. Series and parallel resistors goals to understand the fundamental difference between resistors connected in series and in parallel. The voltage drop across the battery vt will be the total sum of the individual drops across each of the 3 resistors, and.
The quality of resistor also impacts the measurements, while in our lab report we got excellent results, you. D cells and current through the circuit in the lab report section. Voltage of 3 bulbs in parallel have the same voltage of each other and equal to the voltage from power supply. Experiment 3 resistors in series and in parallel print this page to start your lab report 1 copy print 2 copies of this file data page object. The objective of this laboratory experiment is to analyze a series circuit in respect to its components and characteristics. Physic lab 5 series and parallel circuits please help me to correct my lab report and write the conclusion abstract. The objective of this lab is to study circuits with resistors connected in series, parallel, and combination.
Open the dc power supply set up file provided with the lab instructions. The leads to the power supply are the ones that are leading out of the picture on figure 8. Calculate total resistance of a circuit that contains a mixture of resistors connected in series and in parallel. Measurements on dc circuits 1 objectives the objective of this experiment is to analyze simple resistive circuits in dc. Resistors in series and parallel physics lab report series and parallel resistors lab physics capacitor and resistors programming massively parallel processors. Theory the purposes of this experiment are to test ohms law, to study resistors in series and parallel, and to learn the correct use of ammeters and voltmeters. Parallel resistors part 1 parallel resistors part 2.
V3 0 r1 req parallel r2 figure 4 parallel resistors lets say that you took the leads from a voltmeter and placed them in the upper two corners of the circuit in figure 3a. Parallel and series resistor circuit analysis worked example using ohms law reduction. What happens when we add resistors in series or parallel. Resistors in series and parallel lab report please complete the following tables and answer the additional problem at the end. Draw circuit diagrams for the resistor configurations in experiments 6,7,8 and 9 and calculate what you expect to measure for current and voltage at various locations in the circuits. Students will work in teams of two, using digital multimeters to measure voltage and current at various locations in circuits consisting of a voltage source, one or more lamps and one or more resistors. We recorded the current through, and voltage across, each resistor as well as the entire network. Connect a 5v dc voltage supply between the terminals p. If you understand what we are doing in this experiment, you will be all set to do well on the midterm questions about circuits. Along the way, you will establish that certain measurements are a ected by the way in which circuit elements are connected to each other. Simple resistor circuits introduction in this lab, we will investigate ohms law, and study how resistors behave in various combinations. Move the voltmeter leads to the spring clips on either side of the first resistor and press the pushbutton switch and record the voltage across the resistor in the lab report section. This activity will allow the learners to practice and test their understanding of the concepts they have learned so far.
To check the results of connecting series and parallel resistors kcl its a fundamental law that manifestation of the conservation of matter charges, and it. Here is a lab for middle school on series and parallel circuits. This week you are going to examine how the current and voltage of different combinations of resistors are related. Two resistors r1 and r2 are connected in parallel if the voltages v1 and v2 across each are the same and equal to the voltage, v, across the parallel network. The resistance of a resistive circuit element changes with temperature. Introduction electricity is an essential part of the modern life experience, and as an engineer it is essential to know how it behaves and responds to changes in its trajectory. That is, the currents i1 and i2 through each of the resistors add to give the total current, i, flowing into and out of the network.
Sectionobjectives standards lab and demo planning national statelocal chapter opener 1. Note that in these calculations, each intermediate answer is shown with an extra digit. When applying the loop law, there are several details that you need to keep in mind. Most circuits have more than one component, called a resistor that limits the flow of charge in the circuit. R1 r2 a there are two ways in which resistors can be hooked up. Also, measurements in very simple series and parallel circuits will be discussed. Physic lab 5 series and parallel circuits please h. Series and parallel circuits lab report phys 2240 studocu. Test ohms law through the construction of series and parallel circuits. In addition, you will measure the resistance of series and parallel combinations of resistors, and compare the results to theoretical calculations based on equations provided. Not required equipment list qty items part numbers 1 acdc electronics lab em8656 2 d cell 1. Resistors in series and parallel intro physics lab 2. Equipment for lab 6, series and parallel resistor circuits summary.
Loop law the sum of the gains in voltage and drops in voltage around any closed path of a circuit must be zero. Determine whether resistors are in series, parallel, or a combination of both series and parallel. Resistors are in series if the same current must pass sequentially through them. Calculate the effective capacitance in series and parallel given individual capacitances. Choose from 500 different sets of parallel circuits flashcards on quizlet. This experiment should show you the difference between resistors in series and parallel. To study the equivalent resistances of two fundamental connections of resistors resistors in series and in parallel. You will be building circuits similar to the ones you will be working with in homework and exam problems. The physics last week you examined how the current and voltage of a resistor are related. The brightness of the light bulbs in series and parallel. A handson approach applications of gpu computing series axelson j. Designate the smallest resistance as r1, and consecutively larger values as r2, r3, and ra. View lab report lab 4 from phys 1 at university of texas, dallas.
We will use a multimeter to measure the voltage v, resistance r, and current i of said series circuit and use the collected data to determine how a series circuit functions. I performed a series of experiments with different configurations of resistors, measuring the voltage and current across each resistor. Resistors in series lab data confusion physics forums. This is from a physics lab report on voltage and current for resistors in series and parallel. Input connector for volts, ohms, diode test, continuity. Resistance values are indicated by a standard color code. Two resistors r 1 and r 2 are connected in series if all the current that passes through r 1 also passes through r 2. Series circuits series and parallel circuits siyavula. Analysis on series and parallel circuits an electrical network is an interconnection of electrical elements such as resistors, inductors, capacitors, transmission lines, voltage sources, current sources, and switches. The equivalent overall resistance is smaller than the smallest parallel resistor. To compare the current and voltage distribution in parallel and series circuits. Ohms law iii resistors in series and parallel v rrr 2 1 2 3 e v 1 v 3 v t i 1 i i t 2 i 3 figure 1. In some cases when we do not get the desires or specific resistor values we have to either use variable resistors such. Sep 02, 2011 in a circuit in parallel, the two resistors are both 51.
The instructor will specify how to turn in the report. Introduction to basic laboratory test and measurement equipment 1. Identify series and parallel parts in the combination of connection of capacitors. Open the dc power supply file that is distributed with the lab instructions. Notice the voltmeter has leads in the com and v ports and is connected from one side of the resistors to the other side. Then well learn how to measure the current through a wire, as well as the voltage between two points in a circuit. Therefore, for two resistors in series the current i1 through r1 is the same as the current i2. Find the current that would pass through each resistor and the voltage across each if they are connected in a series b parallel. Ncert class 10 science lab manual resistors in parallel. To calculate the voltages and currents in simple circuits involving only resistors using the rules for adding series and parallel resistors. In the series circuit, we were able to determine that each resistor in the. The majority of the data i got tells me that i may have set my circuit up as a parallel series however the fact that the total measured current is not equal to the sum of the separate currents measured at each resistors conflicts with this. When resistors are connected such that they branch out from a single point and join up again in the circuit.
While no scientificpractical can perfectly match the theory, the actual results depend on environmental conditions, the accuracy of equipment under test. Derive expressions for total capacitance in series and in parallel. In some cases when we do not get the desires or specific resistor values we have to either use variable resistors such as potentiometers or presets to obtain such precise values. Use the appropriate list of major features for series or parallel connections to solve for the unknowns.
To practice more complicated construction of circuits. It explains how to calculate the current flowing in a circuit with two resistors in series using ohms law. Connect the power supply to the parallel combination of the resistors r 1, r 2 as shown in figures 8, 9, 10. A measure of this limit on charge flow is called resistance.