For one part of the lab we used two 100 ohm resistors in series and measured the following. When the resistors were placed in series for the second part of the experiment, the power came out to be 0. This is from a physics lab report on voltage and current for resistors in series and parallel. The two circuits were built using the nominal resistance of 100. 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. You can apply these rules to simplify combinations of series and parallel circuits, but you do have to apply the rules carefully, one at a time. Laboratory in wave motion, electricity, magnetism and optics phys 2240 uploaded by. Before moving on to the resistors in parallel, consider the following situation and answer the questions with your partner. In this lab, we will be studying circuits containing resistors in series and.
With these two derived resistor relationships, we can nd all the properties of any circuit containing resistors in series or parallel or any combination of the two. From our measurementsdata, how do i know that our circuit gives the correct value of the resistance. How well does your data support the rule for combining series resistors. Physics 215 experiment 11 series and parallel circuits. To practice more complicated construction of circuits. Copy your spreadsheet results and paste them into the document. Parallel resistors a using the same two resistors from experiment i, now connect them in parallel. The effective resistance of three resistors connected in parallel see figure 2. Suppose you are doing a physics lab that asks you to put a resistor into a. Two resistors in series a circuit having two resistors r1 and r2 in series is indicated below. Series and parallel circuits objectives to study current flow and voltages in series and parallel circuits. Resistors in series and parallel arrangements in order for charges to move in a conductor, there must be a potential difference across the conductor, and there must be a complete path leading away from and back to the. Mr habgood shows you how to measure the total resistance of resistors in series and parallel.
The proposed of this lab is to learn how resistors are used in series and in parallel. Use the appropriate list of major features for series or parallel connections to solve for the unknowns. 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. The instructor will specify how to turn in the report. Lab 4 resistors in series and parallel introduction\abstract in this.
To study the equivalent resistances of two fundamental connections of resistors resistors in series and in parallel. For the third part of the experiment, remove all resistors and connect wires to the light bulb, as shown in figure 4. The voltage drop across the battery vt will be the total sum of the individual drops across each of the 3 resistors, and. The simplest combinations of resistors are series and parallel connections figure. You may want to do the calculations for each circuit before coming to lab.
Not required equipment list qty items part numbers 1 acdc electronics lab em8656 2 d cell 1. Apply the knowledge you have about series and parallel connection of resistors to determine the effective resistance of circuits. Resistors are in series if the same current must pass sequentially through them. The definitions of series and parallel circuits will be given in this lab. The brightness of the light bulbs in series and parallel.
Determine whether resistors are in series, parallel, or a combination of both series and parallel. Now, the circuit can be simplified to the following. If the resistor resistance increases than the amount of current will decrease. Three resistors with different resistances ranging from. The resistance of a resistive circuit element changes with temperature. Physic lab 5 series and parallel circuits please help me to correct my lab report and write the conclusion abstract. According to the results in table 1, the total resistance r measured obeys equation 6, where the resistances for components in series add to. In this lab we will measure and analyze currents and voltages for circuits containing a single resistor and also for two resistors in series and for two in parallel. Equation 7 gives the e ective resistance for resistors in parallel. If two resistors are in series, then same current i flow through each resistor.
Ohms law iiiresistors 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. Therefore, this lab displayed ohms law because as the resistors resistance increased the electric current decreased. To investigate the characteristics of resistors wired in series and parallel circuits. Data section includes a diagram of the series and the parallel circuit. For example, consider 1 resistor r 1 in series with a parallel pair r 2, r 3. Using equations 4 and 7, we can nd all the properties of any circuit containing resistors in series or parallel or any combination of the two. This is because these three resistors are in series. Is the equivalent resistance, r eq, of a series circuit greater than or less than any individual resistor. Resistors in series and parallel introductionabstract in this experiment, i used resistors. Physic lab 5 series and parallel circuits please h. Print this page to start your lab report 1 copy print 2 copies of this file data page object.
In some cases when we do not get the desires or specific resistor values we have to either use variable resistors such. In order to learn about them, one electrical circuit in series and one in parallel were constructed. Figure 2 shows resistors in series connected to a voltage source. Explain why total resistance of a parallel circuit is less than the smallest.
Notice the voltmeter has leads in the com and v ports and is connected from one side of the resistors to the other side. Resistors in series and parallel university physics volume 2. To calculate the voltages and currents in simple circuits involving only resistors using the rules for adding series and parallel resistors. Your answers to the questions below should show some thought. Use a multimeter to measure resistance, dc voltage, and current. And we can see the relationship of the resistances, current and voltage in circuit which related to ohms law. It explains how to calculate the current flowing in a circuit with two resistors in series using ohms law. Resistors of two or more can be placed in series or paralle.
Resistors in series lab data confusion physics forums. You will be building circuits similar to the ones you will be working with in homework and exam problems. Parallel lab included, labeled and organized all parts of the lab report. 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.
To compare the current and voltage distribution in parallel and series circuits. Seriesparallel circuits lab free class notes online. I performed a lab on resistors in series the other day, and i believe my data is incorrect. 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. View lab report lab 4 from phys 1 at university of texas, dallas. Series and parallel circuits lab report phys 2240 studocu. Examine the circuit diagram to make this assessment. This physics video tutorial provides a basic introduction into dc circuits. In this experiment, we could learn the difference between resistors in series and parallel. Resistors in series and parallel series resistor properties any time we have more than one resistor in a row, the configuration is described as having the resistors in series or series resistors figure 1. Note that in these calculations, each intermediate answer is shown with an extra digit. Find the current that would pass through each resistor and the voltage across each if they are connected in a series b parallel. Call over a ta or instructor and explain your conclusion to them.
In this portion of the lab, we will be studying circuits containing resistors in series and in parallel. Introduction in lab exercise 3, resistors in series and parallel, the expectation is to learn how resistors are used in series and in parallel by constructing electrical circuits in those configurations. Resistance, ohms law, and i v curves lab report studocu. 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. Resistors in series and parallel physics lumen learning. Recently, we did a lab where we constructed a circuit with two 1 k. Start this problem by determining the effective resistance of resistors 2, 3, and 4. Resistors in series and parallel connections fau studocu. A student in a physics lab mistakenly wired a light bulb, battery, and switch as shown in. In our previous post about resistors, we studied about different types of resistors. Three resistors r1, r2, and r3 connected in series. Adjust the power supply until the potential difference across the resistors is 1.
Representative results anticipated from the above procedure are listed below in table 1 for resistors in series, and in table 2 for resistors in parallel. Repeat steps 46, but leave the ammeter on the 10 a range. Note that in these calculations, each intermediate answer is shown with an. Physics 215 experiment 11 series and parallel circuits 45 5. General physics iii lab page 1 of 6 pcccascade experiment.
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. First, lets remind ourselves that the effective resistance of resistors in a series is and the effective resistance of resistors in parallel is. Also, measurements in very simple series and parallel circuits will be discussed. If r is constant, the same for all v, then the circuit element obeys ohms law. When doing so, one will also be able to reinforce the use of the digital multimeter to measure current. To use ohms law to calculate equivalent resistance of series and parallel circuits. In the series circuit, we were able to determine that each resistor in the system. Have the instructor check your circuit before proceeding.
1174 806 953 1163 211 1421 1497 1153 476 708 914 1140 1286 1567 478 113 1285 1193 75 1257 1568 1389 465 863 589 51 938 540