If your pdf reader is displaying an error instead of opening a pdf file, chances are that the file is c. After the file opens, there should be a graph of voltage vs time displayed. Partner submitted february 30, 2753 introduction we studied the voltage across a capacitor as it charged or discharged through a known resistor. In this experiment, you will work with a circuit where a resistor is. When the rc circuit below is discharging, at 15ms, what percent of the maximum charge is still in the capacitor. Rc circuits 3 q cv where q is total charge, c is the measure of how big the cap is how much charge it can store at a given voltage. Rc transient circuits if the time constant is very large relative to the halfperiod t2 of the input pulse, the circuit does not even come close to charging before the pulse falls again. Introduction to the oscilloscope and rc circuits introduction this experiment will lead you through the steps on using an oscilloscope to measure the output of a dc power supply and the output of a function generator and then to utilize the oscilloscope to measure the time dependent properties of a simple rc circuit.
For this circuit, we will assign experimental values as follows. You can use the tools in paint to add something to a different document. Show that the capacitive time constant rc has units of seconds. In place of the multimeter used in the first part of lab. The rc circuit 1 university of north carolina 74 part 2. It is the way a physicists might describe how a cap. In this experiment, you will work with a circuit where a resistor is combined in series with a capacitor. Under file, select open experiment, choose the file folder named capstoneactivities, and then select the rc circuit activity. Be careful when measuring the voltage of the different elements in your. This experiment will introduce you to the properties of circuits that contain both resistors and capacitors. Further, you will determine the time constant from the analysis of the transient processes and make predictions for the time to measure a. In this laboratory you will examine a simple circuit consisting of only one capacitor and one resistor. Experiment 6 time domain analysis of an rc circuit achievements in this experiment you will analyse a simple network using tools such as steps, impulses, exponential pulses and sinusoids to compare theory and practical results. To combine pdf files into a single pdf document is easier than it looks.
Circuit for rc chargedischarge measurement where vt is the sensor used to measure the potential difference across the capacitor as a function of time. To study the transient behavior of voltage and current in rc circuits. But to the extent thatvout moves, it is imperfect, because that movement makes vcap differfromvin. The paint program can help you make new image files, but it cannot open document or pdf file.
In place of the multimeter used in the first part of lab, the oscilloscope will be used to measure the voltage across the capacitor. To experimentally determine the resonance frequency in a series rlc circuit and compare this to the expected resonance value. Making a pdf file of a logo is surprisingly easy and is essential for most web designers. After a period equivalent to 4 time constants, 4t the capacitor in this rc charging circuit is said to be virtually fully charged as the. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. To verify the equivalent capacitance of capacitors in parallel and series combinations. This circuit provides a dc voltage of v dd2 at the output. Calculate the capacitance of the capacitor in a rc circuit. Rc transient circuits rc circuit response to a periodic stepvoltage excitation with its inertialess electron beam, the oscilloscope is particularly adapted for the display of voltage waveforms that are repetitive. Experiment 8 rc circuits nature, to be commanded, must be obeyed. A capacitor is composed of two plates with either air or an insulator also known as a dielectric between the plates. For a circuit composed of a resistor and capacitor an rc circuit see figure 1. Once youve done it, youll be able to easily send the logos you create to clients, make them available for download, or attach them to emails in a fo.
Rc circuits 3 figure 5 also records the voltage over the resistor. Pre lab do the orcad simulations of both rc and rl circuits, calculate time constants and plot the resulting waveforms across c in the case of rc and the waveform of the current in the case of rl. Potential di erence across a capacitor in an rc circuit as a function of time. For series capacitors, capacitance is calculate the transient period 5 the charging and discharging of the capacitor will stabilize at this period. Passive rc circuit step response 2012 digilent, inc.
Pdf file or convert a pdf file to docx, jpg, or other file format. Power in ac circuits ipower formula irewrite using icos. The rc circuit department of physics and astronomy. If the capacictance in the circuit is doubled, how is the halflife a ected. Rc 5 it is interesting that the rate of discharge depends only upon the product of r and c, which, again, is called the time constant. To determine the capacitance of an unknown capacitor from the time constant. The goal is to show that the chargedischarge follows an exponential function and that. At the end of the experiment, you will be able to understand how the charge, voltage, and current change as the capacitor charges. A capacitor is a passive electronic component that stores energy in the form of an electrostatic field. Adobe systems is a software manufacturer that has created many document and multimedia editing programs. For the circuit shown in figure 1, if the capacitor is initially uncharged, and if v in undergoes a step change from 0 to v, the capacitor voltage for t 0 will be given by input cause lts output effect time seconds. Consider, for example, the series connection of a resistor, capacitor and optional. Capacitors a capacitor is a passive electronic component that stores energy in the form of an electrostatic field.
For ac sound signals, the capacitor will block low frequencies but pass high frequencies. In place of the multimeter used in the first part of lab, the oscilloscope will be used. In the orcad, use vpulse as the vs and set v15v, v25v, td0. Rc series circuits time dependence physics 226 lab. Slide 2 lab objectives and materials objectives in this experiment, you will build resistorcapacitor circuits and make measurements of the capacitor voltage as it undergoes charging and discharging. The circuit used to couple sound into your arduinois a simple rc circuit. If a capacitor of capacitance c in farads, initially charged to a potential v 0 volts is connected across a resistor r in ohms, a timedependent current will flow according to ohms law. The voltage through an rlc series circuit will be measured as a function of frequency for a fixed applied voltage. Transient response of rlc series and parallel circuit.
V rc, rl and rlc circuits v university of michigan. However, since we have swapped the resistor and the capacitor, the grounds are at the same point in the circuit. The objective of this experiment is to begin to become familiar with the properties and uses of the exponential function in circuits and engineering in general. Thus, you are measuring the voltage of the resistor in an rc circuit. This means it can be viewed across multiple devices, regardless of the underlying operating system. If the resistance in the circuit is doubled, how is the halflife a ected.
Repeat step 6 and 7 and record that value in table 53. A schematic representation of three capacitors in series. A pdf file is a portable document format file, developed by adobe systems. First measure the capacitance of the large capacitor provided using a capacitance meter the nominal value is 47 f. The equation shows that the rc circuit is an approximate integrator or approximate. Step response model when a voltage step is applied to a series rc. This allows us to make the mathematical simplification. Rc and rl circuits page 1 rc and rl circuits rc circuits in this lab we study a simple circuit with a resistor and a capacitor from two points of view, one in time and the other in frequency. To investigate ohms law and to determine the resistance of a resistor. Read on to find out just how to combine multiple pdf files on macos and windows 10. Rc circuits introduction the purpose of this experiment is to investigate the effects of capacitors in dc direct. For ac signals, the two resistors are in parallel, so the equivalent circuit is shown on. The output is the voltage across the resistor, which is essentially the current, or dqdt.
This situation is shown by the rc resistorcapacitor circuit below when the switch is closed. You will then synthesize and test an equivalent network using a 1st order feedback structure. A pdf portable document format is a widely popular type of document format created by adobe. We will also study the behavior of the current and voltages in an rc circuit.
Introduction the objective of this lab is to study the transient properties of circuits with resistors and capacitors. In this lab, you will explore how x the charge and voltage on the capacitor change with time when a capacitor is charging or discharging x the current in the rc circuit change with time when the capacitor is charging and discharging this lab is based on circuit construction kit simulator that can be accessed at click on the picture to download the simulator file. To change the voltage suddenly, a function generator will be used. Ee 43100 rc circuits 1 experiment guide for rc circuits i. To measure the time constants associated with a discharging and charging rc. Jan 30, 2007 the goal of this experiment is to calculate an unknown capacitance in a simple rc circuit using two different theoretical models. This product of r and c has been given a new name, i. Figure 1 details the circuit used in this experiment.
We will study the way voltages and currents change in these circuits when voltages are suddenly applied or removed. The viewpoint in time is based on a differential equation. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file. Rc is the time constant of the rc charging circuit. In the orcad, use vpulse as the vs and set v15v, v25v, td0, tr0, tf0, per1frequency and pw0. Objectives collect voltagetime data for a capacitor in a rc circuit and curve fit the data. Assuming the switch in the circuit above has been closed for a long time. In this experiment, you will measure vt across the capacitor as it discharges. Discussion of principles a capacitor consists of two conductors separated by a small distance. By applying a constant1 voltage also called dc or direct.
You will study this circuit and ways to change its e ective capacitance by combining capacitors in series and parallel arrangements. Rc, rl and rlc circuits introduction in this experiment we will investigate the behavior of circuits containing combinations of resistors, capacitors, and inductors. The purpose of this lab session is to examine how a capacitor stores its electric charge and how it discharges by producing a current through a resistor. In a is the schematic diagram of a capacitor discharging through a resistor. As we might have expected, this exceeds the source voltage by a substantial amount and the phase shift is the reason for it. We do not want the plates to be touching, because then we would only have a conductor.
Xperiment 10 time constant of an rc circuit objectives the purpose of this experiment is to measure the time constant of an rc circuit experimentally and to verify the results against the values obtained by. In the previous two labs youve dealt strictly with resistors. Experiment 10 rlc series circuit resonance in an rlc series circuit objective. This experiment features an rc circuit, which is one of the simplest circuits that uses a capacitor. This lab is concerned with the characteristics of capacitors, and circuits consisting of a resistor and a capacitor in series. I paid for a pro membership specifically to enable this feature. An rc circuit is composed of at least one resistor and at least one capacitor. From your solution to the differential equation for the rc circuit show that a solution, consistent with no initial charge on the capacitor, is v r e tr, where. The capacitor initially uncharged is connected to a voltage source of constant emf e. The purpose of this lab is to learn and understand rc circuits. Depending on the type of scanner you have, you might only be able to scan one page of a document at a time.
Use both channels of the scope to see the source voltage and the voltage across the capacitor. During the positive half cycle of the input voltage, scr become forward biased but it will not conduct until its gate current exceeds gate. The series rc circuit and the oscilloscope we shall use the oscilloscope to study charging and discharging of a capacitor in a simple rc circuit similar to the one shown in fig. In this experiment we will determine how voltages are distributed in resistor circuits according to ohms law and explore series and parallel combinations of resistors. If your scanner saves files as pdf portbale document format files, the potential exists to merge the individual files into one doc. One of the fun things about computers is playing with programs like paint. Capacitor lab report conclusion free pdf file sharing.
As presented in capacitance, the capacitor is an electrical component that stores electric charge, storing energy in an electric field figure \\pageindex1a\ shows a simple rc circuit that employs a dc direct current voltage source \. An oversized pdf file can be hard to send through email and may not upload onto certain file managers. In both cases, it was simpler for the actual experiment to replace the battery and switch with a signal generator producing a square wave. Rc circuits california state university, fullerton. The oscilloscope can continuously display some portion of a periodic input waveform. Using pspice, draw a rlc circuit as pictured as figure 1 and choose r38. This article explains what pdfs are, how to open one, all the different ways. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved. Since charge is conserved, it can only move from the plate of one capacitor to the connected plate of the. Retrieve a power cord and a voltage sensor from the wire rack hanging on the wall in the lab room. Import theoscilloscope data you acquired in partaof the lab proceduresinto excel, matlab,or any similar software package which provides basic mathematics and plotting capabilities. Most electronic documents such as software manuals, hardware manuals and ebooks come in the pdf portable document format file format.
The equation shows that the rc circuit is an approximate. In general, the complex impedance is defined as follows. To study operation of r and rc firing circuit for scr. Simulate the above rlc circuit by using of transient. Theory circuits with steady currents and voltages are of some importance, but timevarying currents are more interesting. Resonance circuit introduction thus far we have studied a circuit involving a 1 series resistor r and capacitor c circuit as well as a 2 series resistor r and inductor l circuit. Ee 43100 rc circuits 3 note that if the frequency of the square wave vin is too high i. An rc circuit is a circuit containing resistance and capacitance. Yes, to the extent that vcap vinand thus dvcapdt dvindt, it works. In todays lab youll be using a new circuit element called a. Bacon 15611626 objective to study a simple circuit that has timedependent voltages and current. Rc circuits laboratory manual page 2 of 11 3 prelab exercises 3. Experiment5 c 3 c 2 c 1 q q q v v 1 v 2 v 3 figure 7.
A capacitor consists of two small metal plates that are separated by a small distance. If the charging voltage in the circuit is doubled, how is the halflife a ected. Students use a voltage sensor and a current sensor with the acdc electronics laboratory to determine how the potential differences across the resistors and capacitor in a simple rc circuit differ when the capacitor is charging, discharging, and fully charged, and how these differences affect the current through each component in the circuit. For the circuit shown in figure 1, if the capacitor is initially uncharged, and if v in undergoes a step change from 0 to v, the capacitor voltage for t 0 will be given by. Before doing this experiment, students should be able to analyze simple circuits consisting of combinations of resistors. Both channel share a common ground so there is no need to hook up both ground cables. Prelab questions california state university, fullerton. Rc circuits consider the circuit shown in figure 1.
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