Build circuits with batteries, resistors, light bulbs, fuses, and switches. 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. Ncert class 10 science lab manual resistors in parallel. Now take the same resistors and repeat the stuff above with resistors in parallel. For example, consider 1 resistor r 1 in series with a parallel pair r 2, r 3. This experiment should show you the difference between resistors in series and parallel. 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. Series and parallel connections the objectives of this lab are.
Resistors in series and parallel physics libretexts. If you understand what we are doing in this experiment, you will be all set to do well on the midterm questions about circuits. Such a combination is called the parallel combination of resistors. Physic lab 5 series and parallel circuits please h. Resistors in series and parallel combinations electronics post. P222 resistor lab california state university, bakersfield. In this experiment, we could determine the total current flowing through a series circuit and parallel circuit, the voltage across each resistor and the current flowing through a series circuit and parallel circuit. Jan 09, 2017 mr habgood shows you how to measure the total resistance of resistors in series and parallel. This week you are going to examine how the current and voltage of different combinations of resistors are related. When two resistors are in series, they have the same current running through them.
The equivalent overall resistance is smaller than the smallest parallel resistor. Series and parallel resistors goals to understand the fundamental difference between resistors connected in series and in parallel. Ohms law ii resistors in series and parallel prelab. Loop law the sum of the gains in voltage and drops in voltage around any closed path of a circuit must be zero.
Dont put the power supply over 3 volts or you will destroy light bulbs. Resistors in series and parallel introduction direct current dc circuits are characterized by the quantities current, voltage and resistance. The object of this lab is to study resistances in series and parallel and to observe and quantify the effect of an ammeter on a circuit. 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. Feb 01, 2017 parallel and series resistor circuit analysis worked example using ohms law reduction doc physics duration. To compare the current and voltage distribution in parallel and series circuits. The brightness of the light bulbs in series and parallel. Nov, 2011 these simple circuits look boring on the surface try changing some values like a voltage at 120 or 277 then resistances of 240 ohms and then add wire resistance. To study the equivalent resistances of two fundamental connections of resistors resistors in series and in parallel. Physics 215 experiment 11 series and parallel circuits 45 5. Series and parallel circuits lab report phys 2240 studocu. Lab 4 series and parallel resistors physics 212 lab what you need to know.
Laboratory in wave motion, electricity, magnetism and optics phys 2240 uploaded by. I performed a series of experiments with different configurations of resistors, measuring the voltage and current across each resistor. Three resistors with different resistances ranging from 50 to 200 ohms, voltmeter or voltage. Notice the voltmeter has leads in the com and v ports and is connected from one side of the resistors to the other side. 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.
In part 1 of the lab you will be analyzing the very top circuit and then you will work your way down the board for the other parts of the lab. Adjust the power supply until the potential difference across the resistors is 1. This experiment demonstrates how current is distributed in resistors connected in series or parallel, and thus describes how to calculate the total effective resistance. Ohms law, series and parallel combination of resistors course link. Oct 07, 2015 resistors in series and parallel combinations. Resistors in series and parallel circuits frederiksen. Feb 12, 2019 hopefully you remember how to find the resistance of an object by measuring the voltage and current from last lab. The purposes of this experiment are to test ohms law, to study resistors in. And we can see the relationship of the resistances, current and voltage in circuit which related to ohms law.
The voltage drop across the battery vt will be the total sum of the individual drops across each of the 3 resistors, and. Ohms law and resistors in series and parallel college of san. Return the acdc electronics laboratory board to the way it was at the beginning of procedure 1. Review how to find the equivalent resistance for resistors in parallel and series configurations. 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. In this lab, we will be studying circuits containing resistors in series and. Resistors in series and parallel physics lab report. Determine if everyday objects are conductors or insulators, and take measurements with an ammeter and voltmeter. 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.
If you arrange resistors in an order as shown in figure 2 below, that is all left ends are connected to one terminal and all right ends are connected to another terminal of the battery source of emf. The resistance of a resistive circuit element changes with temperature. Resistors in parallel measure voltage and current for resistors in parallel two 100. 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. See if you can figure out something to plot that will give you a straight line. In the previous lab you made a circuit that contained one resistive element i. R1 r2 a there are two ways in which resistors can be hooked up. February 12, 2019 hopefully you remember how to find the resistance of an object by measuring the voltage and current from last lab. Again, at first glance this resistor ladder network may seem a complicated task, but as before it is just a combination of series and parallel resistors connected together. If r is constant, the same for all v, then the circuit element obeys ohms law. Series and parallel resis tances are combined to find the equivalent resistance of a. Recall from the last lab that resistance is the impedance to current flow.
February 2, 2020 let me start with a couple of videos. In this experiment, we could learn the difference between resistors in series and parallel. You will be building circuits similar to the ones you will be working with in homework and exam problems. Contents1 ncert class 10 science lab manual resistors in series1. Jan 17, 2020 contents1 ncert class 10 science lab manual resistors in series1. 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. Physics 215 experiment 11 series and parallel circuits. The physics last week you examined how the current and voltage of a resistor are related. Open the dc power supply set up file provided with the lab instructions.
Series and parallel resistors physics 212 lab the circuit board in front of you has three circuits on it. To practice more complicated construction of circuits. Two resistors r 1 and r 2 are connected in series if all the current that passes through r 1 also passes through. Examine the circuit diagram to make this assessment. Determine whether resistors are in series, parallel, or a combination of both series and parallel. If ri, r2, and r3 are connected in a circuit in series as in figure 33. Resistors are in parallel if their terminals are connected to the same two nodes.
Not required equipment list qty items part numbers 1 acdc electronics lab em8656 2 d cell 1. Resistors in series and parallel physics lab report series and parallel resistors lab physics capacitor and resistors programming massively parallel processors. In our previous post about resistors, we studied about different types of resistors. To check kirchhoffs current law kcl from previous lab 2. Resistors in series and parallel example no2 find the equivalent resistance, r eq for the following resistor combination circuit. A handson approach applications of gpu computing series axelson j.
Series and parallel resis tances are combined to find the equivalent resistance of a series parallel circuit. You can have as many resistors in series as you like. Resistors in series and parallel intro physics lab 2. Sep 02, 2011 the result of this lab is the equivalent resistance of the components in a electrical circuit in series equals to the sum of all the resistors. The voltage drop across the battery vt will be the total sum of the individual drops. Power ratings in seriesparallel this sort of series and parallel combination of resistors works forpower ratings, too.
In this lab you will work with two circuits, one series and one in parallel. Series and parallel resistors california state university. 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. Note that the resistors are connected to each other at two points. The objective of this experiment is to verify ohms law applied to a. When resistors are connected such that they branch out from a single point and join up again in the circuit. Connect the two resistors on the circuit board that are marked 150 ohms and 700 ohms as shown in figure 6a. Resistors in series and parallel connections fau studocu. Resistors can be combined in simple circuit arrangements that increase or decrease the overall resistance in the circuit. Part 1 the four resistors in this part of the lab are in series. Each of these circuits will use the same three resistors. When applying the loop law, there are several details that you need to keep in mind.
These arrangements are called series and parallel circuits. Resistors are in series if the same current must pass sequentially through them. The measurements of voltage and current for one bulb in parallel are the same as the measurements for one bulb in series. According to the results in table 1, the total resistance r measured obeys equation 6, where the resistances for components in series add to.
Lab 4 resistors in series and parallel introduction. Physic lab 5 series and parallel circuits please help me to correct my lab report and write the conclusion abstract. Three resistors r1, r2, and r3 connected in series. The goal here is to see if we can model resistors in series and parallel as just one single equivalent resistor. Mr habgood shows you how to measure the total resistance of resistors in series and parallel. They are said to be in parallel since the voltage across each resistor equals the voltage of the power supply and the resistors provide parallel paths for the current flow. This experiment demonstrates how current is distributed in resistors connected in series or parallel, and thus describes how to calculate the total effective. Lab 4 resistors and capacitors connected in series and in. Jan 17, 2020 ncert class 10 science lab manual resistors in parallel class 10 physics practical introduction.
Use the appropriate list of major features for series or parallel connections to solve for the unknowns. Find the current that would pass through each resistor and the voltage across each if they are connected in a series b parallel. In this lab, we will be studying circuits containing resistors in series and in parallel. Recall the current and voltage properties of series and parallel configurations of resistors. To calculate the voltages and currents in simple circuits involving only resistors using the rules for adding series and parallel resistors. In some cases when we do not get the desires or specific resistor values we have to either use variable resistors such. Parallel and series resistor circuit analysis worked example using ohms law reduction doc physics duration. Ncert class 10 science lab manual resistors in parallel class 10 physics practical introduction. I also used the ohms law to determine the calculated values and compare. Ncert class 10 science lab manual resistors in series. Parallel resistors part 1 parallel resistors part 2. In this lab, you will learn how resistors in series and parallel add and how these configurations affect the current flowing in the circuit.
View the circuit as a schematic diagram, or switch to a lifelike view. The result of this lab is the equivalent resistance of the components in a electrical circuit in series equals to the sum of all the resistors. For example, if current flows through a person holding a screwdriver and into the earth, then r1 in figure 1 a could be the resistance of the screwdrivers shaft, r2 the resistance of its handle. Conclusion on series and parallel circuits conclusion on. 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. You will apply a dc voltage to the circuit and measure the current through and voltage across each resistor. Using ohms law, it possible to convert between the voltage and current through a resistance, if the resistance is known. Resistors are in series whenever the flow of charge, called the current, must flow through devices sequentially. 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. 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.
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