The most common place you will encounter electric circuits is across them. The equivalent overall resistance is the sum of the individual resistance values. The series circuit a series circuit or series connected circuit is a circuit having just one current path. Combination circuit equipment universal circuit board 2 100. Conclusions electrical resistance and conductance resistor. Parallel circuits series and parallel circuits siyavula. Suppose for example, the voltage source v12 volts and the resistors have values r1 10, 000 w and r2 20, 000 w.
Conclusion on series and parallel circuits course hero. It states that the amount of electric current flowing in a circuit is directly proportional to the voltage applied to the circuit, and inversely proportional to. The resistance of a resistive circuit element changes with temperature. 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.
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. Apparatus equipment to examine the voltage and current flow in a series and parallel circuit of resistors. Objectives the objective of this experiment is to verify ohms law applied to a series resistors, b parallel resistors, and c a module of parallel resistors in series with another resistor equipment a few ceramic resistors 100 to 500 ohms, a dcpower source, 2 multimeters, a calculator, and a few connecting wires with alligator clips. Measurements on dc circuits 1 objectives the objective of this experiment is to analyze simple resistive circuits in dc. Conclusion on series and parallel circuits conclusion on. This lesson is relatively unusual as an inquiry lab as it was designed with three goals in mind. Apply the knowledge you have about series and parallel connection of resistors to determine the effective resistance of circuits given in figures 4 and 6 use these resistance values r1 2. In electrical circuits, resistance is the property of an electric conductor by which it opposes a flow of electricity and dissipates electrical energy away from the circuit.
Firstly, the knowledge of the differences between series and parallel circuits was the basic skill used to wire up our houses. Replacing part 2 of the lab resistors are connected in series 2. If two resistors are in series, then same current i flow through each resistor. Conclusion in conclusion i have learned how to operate the dmm as a. You will be building circuits similar to the ones you will be working with in homework and exam problems. From the experiments we have done, we can conclude that in series circuit, the resistor serves as a voltage divider. 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. How to measure dc voltage and current in a parallel.
If two resistors r 1 and r 2 are connected in series, the currents passing through the two resistors are equal, and the total voltage is equal to the sum of the individual voltages across the. Resistors of two or more can be placed in series or paralle. To use ohms law to calculate equivalent resistance of series and parallel circuits. Physics 215 experiment 11 series and parallel circuits. Resistors in series and parallel, sample of essays. Developing and explaining equivalent resistance laws by carl j.
Determine the ohmic value and tolerance of resistors, using the color code. Proving the formulae for series and parallel resistance introduction. 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. Resistors 2 digital multimeters power supply 5 jumpers 6 wire leads. Also the potential differences across the three resistors should add up to. In figure 2, the current flowing through r 4 does not flow through r 5 and vice. Assistant between terminals p and q as in the figure 3. In a circuit in parallel, the two resistors are both 51. In this experiment, we will study the two simplest combinations. This experiment should show you the difference between resistors in series and parallel. Phys 1402 general physics ii experiment 4 series and. In some cases when we do not get the desires or specific resistor values we have to either use variable resistors such. In some electrical and electronic circuits it is required to connect various resistors together in both parallel and series combinations within the same circuit and produce more complex resistive networks. 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.
To find the imaginary rab that can do the job of the three parallel resistors r1, r2, and r3, it is important to. In that section, it was emphasized that the act of adding more resistors to a parallel circuit results in the rather unexpected result of having less overall resistance. If two resistors r1 and r2 are connected in series, the currents passing through the two resistors are equal, and the total voltage is equal to the sum of the individual voltages across. Use the appropriate list of major features for series or parallel connections to solve for the unknowns. This experiment will have the student investigate the characteristics of parallel circuits. And we can see the relationship of the resistances, current and voltage in circuit which related to ohms law. In figure 1, all of the current flowing from the battery must also flow through the resistors r 1 and r 2. Using a data logger to measure the resistance, the aim of this experiment is to prove the formulae used for calculating series and parallel resistance.
This is a very common activity performed in a electricity and magnetism. Therefore it is easier for current to move through the circuit than if. In this experiment, we calculate our values for voltage, resistance and current by calculations and we verify the results by doing. Ncert class 10 science lab manual resistors in parallel. Electrical resistance and the resistor introduction ohms law is the most fundamental equation in electric circuit analysis. This is from a physics lab report on voltage and current for resistors in series and parallel. Likewise, in the experiment we performed that idea became evident. The obtained measured values using the multitester have some discrepancy with the color coded values. How did you observe resistance, current, and voltage relationships in series and parallel combinations. Science experiment proving the resistance formulae.
Resistors are in series if the same current must pass sequentially through them. There are two ways in which resistors can be hooked up in a circuit. Resistors in series and parallel free essay example. After that the student will investigate the voltage and current relationships in a combination seriesparallel circuit. Examination of the series circuit diagram shows the current does not branch out and therefore the currents in the three resistors are equal. Wenning, coordinator physics teacher education illinois state university goal. Not required equipment list qty items part numbers 1 acdc electronics lab em8656 2 d cell 1. Three resistors r1, r2, and r3 connected in series. If you understand what we are doing in this experiment, you will be all set to do well on the midterm questions about circuits. This activity will allow you to explore a model circuit and decide whether these light circuits are connected in series or in parallel. Physics 215 experiment 11 series and parallel circuits 45 5. Examine the circuit diagram to make this assessment. The three resistors in the figure given below shows that the path for current to flow through the circuit can be in three different routes. Determine whether resistors are in series, parallel, or a combination of both series and parallel.
The purpose of this experiment is to learn how to use a digital multimeter to obtain measurements for voltage, current, and resistance and how to set up resistors in series and parallel connections. The smaller resistor had the largest current going through it because current prefers to go through the path of least resistance. If r is constant, the same for all v, then the circuit element obeys 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.
Then combine that equivalent resistance with the single resistor in series using equation 2. Physic lab 5 series and parallel circuits please help me to correct my lab report and write the conclusion abstract. You should repeat this experiment using two resistors in. A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. Series and parallel resistors physics 212 lab the circuit board in front of you has three circuits on it. You should have completed experiment 4 before working on this lab. In the video i demonstrate how to measure voltage and current in a resistor circuit where the resistors are in parallel. The aim of the experiment was to compare the predicted and actual resistance in the circuit of resistor combinations in series and parallel. Resistors are connected in parallel measurements resistance. Physic lab 5 series and parallel circuits please h.
When we add resistors in parallel to each other the total resistance decreases and the current increases. In this experiment you will examine the difference between series and parallel circuits. The total resistance in the circuit with resistors connected in series is equal to the sum of the individual resistances. Adding resistors in parallel provides more alternative pathways for the current. Rc circuits 2 two circuit elements are in series if all of the current flowing through one also flows through the other. The series circuit a series circuit or seriesconnected circuit is a circuit having just one current path. The results of this experiment found that the series and parallel resistor laws were reasonably good indicators of the real world values of resistance for circuits that contained resistors in series. To examine the voltage and current flow in a series and parallel circuit of resistors. If a more complex connection of resistors is a combination of series and parallel, it can be reduced to a single equivalent resistance by identifying its various parts as series or parallel, reducing each to its equivalent, and continuing until a single resistance is eventually reached.
Notice the voltmeter has leads in the com and v ports and is connected from one side of the resistors to the other side. Procedure connect the three equal resistors that you used in experiment 4 into the series circuit shown below, using the springs to hold the leads of the resistors together without bending them. Experiment 2 resistors in series and parallel connections 1 lab date 7617 report date 71117 inderjit kaur phy2049l section 8 lab instructor udeni purpose. This week you are going to examine how the current and voltage of different combinations of resistors are related. Parallel resistors part 1 parallel resistors part 2 parallel resistors part 3.
Resistors in series and parallel connections fau studocu. Resistors in series and parallel boundless physics lumen learning. There should be the differences, observation and comparison in our conclusion and recommendation. Series resistors experience the same current, but generally different voltages. Last week you examined how the current and voltage of a resistor are related. Series and parallel circuits lab report phys 2240 studocu.
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