If the experiment had been repeated with frequencies 10 times higher than. Describe the pattern of a current flow in an parallel circuit. What are series and parallel circuits series and parallel arrangements in circuits describes two different types of circuit arrangements. What is the difference between voltage and current. A parallel rlc circuit is an example of a bandstop circuit response that can be used as a filter to block frequencies at the resonance frequency but allow others to pass. In circuit b we have resistors r 1 and r 2 combined to get. In these lessons, we will describe what is meant by a parallel circuit. You will be building circuits similar to the ones you will be working with in homework and exam problems. Calculate and measure r t, v 1, v 2, v 3, i 1, i 2, i 3, i t, and i a for the circuit in figure 2. In this activity, students are asked to draw schematics of their circuits. Calculating equivalent resistances in parallel circuits experiment time part 1 experiment time part 2 rules of thumb for series and parallel resistors series and parallel capacitors. An ammeter is a lowresistance device that, if connected in parallel, will short out most components.
Founded in 2002 by nobel laureate carl wieman, the phet interactive simulations project at the university of colorado boulder creates free interactive math and science simulations. Chapter 21 2 voltage and current in rlc circuits iac emf source. Resistance and voltage names wednesday, march 3, 2015 physics 1049l abstract. Natural response of parallel rlc circuits the problem given initial energy stored in the inductor andor capacitor, find vt for t. The frequency corresponding to maximum current is noted and it is the resonant frequency f 0. We will test the accepted rules for resistors connected in series and in parallel. The next part of the experiment is to measure the current at various points in the circuit. Construct the circuit shown in figure 1 and measure i 1, i 2, i 3 and vo. The vertical axis of both graphs has current scaled from 0. As a single, lumped element, inductors find many uses. Circuit lab 3 series and parallel circuit experiment. Note that it will be necessary to break your circuit and remake it in order to insert the ammeter.
I have included an image of a complex circuit, but many are available online. Read on to see how cookies rolling down streets are used as an analogy for the different kinds of. Now you will construct a parallel circuit with two 12. From the values of f 0, f 1 and f 2, the quality factor, q is calculated. Circuits laboratory experiment 5 circuits containing inductance 5. To find the resonant frequency of the designed parallel lcr circuit.
Power calculations in a seriesparallel circuit effects of a rheostat in a seriesparallel circuit knowledge check 1. An electric current is a flow of electric charge around a circuit. Young scientists will model and discuss how an electric circuit works. R, l, c circuits series rc, rl, and rlc circuits parallel rc, rl, and rlc circuits. This laboratory manual is intended for use in an ac electrical circuits course. Comparing series and parallel circuits students use a battery holder, a dcell battery, a mini light socket, and a miniature lamp to build series and parallel circuits. Simulation of rlc series and parallel resonance in basic.
Materials list, advance preparation instructions, lab hints and tips, safety tips, rubric, worksheets, and answer key are provided. Resistive elements are not connected in series or parallel. Part iii currents in series and parallel circuits 1. The voltage through an rlc series circuit will be measured as a function of frequency for a fixed applied voltage. Circuit box, power supply, two digital multimeters one for current and one for voltage, assorted wires and connectors. 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. Seriesparallel circuits seriesparallel circuits can be more complex as in this case. The current flowing through the resistor, i r, the current flowing through the inductor, i l and the current through the capacitor, i c but the current flowing through each branch and therefore each component will be different to.
To analyze this type of circuit, it should first be simplified reduced to an equivalent resistor, req. This is normally referred to as the free air resonance of the driver, or fs. Series and parallel circuit experiment, series, parallel, series circuit, parallel circuit, circuit, electorinc circuit, circuit. Using the above circuit as an example, heres how current would flow as it runs from the batterys positive. Parallel circuits are set up so that the current has an independent path to take through each piece. Technologyengineering progression grades 910 the use of electrical circuits and electricity is critical to. In this experiment, the circuit characteristics of resistors. Experiments for first year electrical engg lab 201516. It also aims to introduce matlab a circuit simulation software tool. All of the circuits that we will need for this experiment are already assembled in the circuit box.
Where v is voltage, measured in volts v, i is current, measured in amperes a, and r is electrical resistance, measured in ohms. Series and parallel circuits activity, electricity, word. The series and parallel components must be identified for accurate analysis of the circuit. Phet sims are based on extensive education research and engage students through an intuitive, gamelike environment where students learn through exploration and discovery. Parallel circuit schematic the third type of circuit you will construct is a combination circuitfig. To give students a solid foundation for labs and further learning, we explicitly define the terms. The circuit has two initial conditions that must be satisfied, so the solution for vt must have two constants. The experiment will also demonstrate the oscillatory behavior of an lc circuit.
This laboratory is about studying resonance in rlc series and parallel circuits. Your series circuit will look something like the drawing below. On the other side, the total voltage of the parallel circuit is equal to v1 and v2 through out the circuit. This moves from the negative end of the cell to the positive end. Experiments for first year electrical engg lab 201516 dept of electrical engineering, shri ramdeobaba college of engineering and management, nagpur 4400 india page 11 experiment no. Series and parallel circuits 1 lab university of michigan. This can be verified using the simulator by creating the above mentioned parallel lcr circuit and by measuring the current and voltage across the inductor, capacitor and resistor. Parallel lc circuits are frequently used for band pass filtering governed by this resistance. Experiment with electric circuits and conductivity. Pdf r, l, c circuits series rc, rl, and rlc circuits. Rlc series and parallel circuits lab free class notes. Use the dmm set up in ammeter mode to measure milliamps at the four points a, b, c and d. This activity will allow you to explore a model circuit and decide whether these light circuits are. In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.
For part iii of the experiment, you will use two current probes. The frequencies f 1 and f 2 corresponding to half power points is noted and from it the bandwidth, f 1 f2 is noted. In the previous experiment we studied ohms law for a single resistor. 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. Your students will enjoy seeing a schematic of a complex circuit. This paper presents the remote experiment serial and parallel rlc circuit. This also strengthen the knowledege that voltage stays constant in parallel circuit. Look up formulas for the equivalent resistance of resistors in series and parallel, and write them down in your lab notebook. The questions we will be trying to answer will includehow.
Ece 2120 electrical engineering laboratory ii clemson university. For a parallel circuit, the total equivalent resistance, r eq, is. To experimentally determine the resonance frequency in a series rlc circuit and compare this to the expected resonance value. Electrical tutorial about parallel rlc circuits and analysis of parallel rlc circuits that contain resistor, inductor and capacitor and their impedances. Series and parallel circuits science fair, science. Lcr circuit series and parallel psbrahmacharys blog. Learners solve 14 problems related to voltage, current and power in a single source, sixresistor circuit. Current in parallel circuits examples, solutions, videos. The voltage drop across the battery vt will be the total sum of the individual drops across each of the 3 resistors, and. The most common place you will encounter electric circuits is across them. Evaluate simple series and parallel circuits to predict changes to voltage, current, or resistance when simple changes are made to a circuit. Build circuits with batteries, resistors, light bulbs, fuses, and switches. To study the variation in current and voltage in a parallel lcr circuit.
This stops the circuit from draining the battery while you add jumpers. Converting the circuit from a series to a parallel circuit. Calculate and measure rt for the following circuits. In the above parallel rlc circuit, we can see that the supply voltage, v s is common to all three components whilst the supply current i s consists of three parts. When we add up resistors in parallel, we have to do it reciprocally. A companion course to ece 2620 electrical circuits ii. Three resistors r1, r2, and r3 connected in series. Parallel and series circuits lab go to the following address to download the applet. As a matter of fact, ohms law applies not only to a single resistor, but also to a part or the whole circuit network, as long as it is non active no power supplies in that part of the circuit and linear no nonlinear device in.
These include as buffers on large transmission lines to reduce energy surges, on a smaller scale. These two laws along with ohms law are the foundation of electric circuit theory and analysis. Physics 215 experiment 11 series and parallel circuits. Instructions construct both a series circuit and a parallel circuit using the batteries, wires, and bulbs provided to you. In this experiment you will examine the difference between series and parallel circuits. This experiment will be used to examine the sinusoidal frequency response of the series and parallel to see at what frequency the current through an rlc series becomes or the voltage across a parallel rlc circuit reaches maximum value. Pdf simulation of rlc series and parallel resonance in. When dealing with a series circuit the only way to figure it out was to solve the impedance triangle. Experiment 10 rlc series circuit resonance in an rlc series circuit objective. The lab includes the standard symbols for each of the parts battery, motor, bulb, and test lead. The purpose of this lab is to experiment with the variables having to do with the operation of electrical circuits. First they will draw a model of the flow of electrons and then build an actual circuit. Calculate i 1, i 2, i 3 and vo for the circuit shown in figure 1 for f 1khz and f 10khz. The purpose of lab experiment is to continue to build circuit construction skills using different circuit element.
Use pspice to determine i 1, i 2, i 3, and vo in figure 1 at f 1khz and f 10khz. The result of this experiment is reliable because the results are constant in all sets during the lab and it is the same as the formula in the book. In a series circuit, the parts of the circuit are in a row, one after the other so current flows through them. If the following resistors were replaced with the values indicated. Rlc series and parallel circuit at resonance is a part of basic electrical engineering course which is mandatory for all discipline students to aware the idea of resonance in all technical. This visual will help your students remember the difference between an open circuit, close circuit, series circuit, and parallel circuit. The complete diagram is rotated so that the phasor for v s is horizontal and used as the reference phasor.
The effective impedance of the circuit is nothing more than r, and the current drawn from the source is in phase with the voltage. Opens and shorts in parallel circuits opens in parallel circuits. Doing physics with matlab resonance circuits series rlc circuits matlab download directory matlab scripts crlcs1. Draw your own diagram below that illustrates how your parallel circuit will look. Leveled, nonfiction, and printfriendly science article this article is an introduction to simple circuits and the characteristics of series and parallel circuits. 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.