Ohms law is that more voltage creates more current and more resistance creates less current. How electrical charge relates to voltage, current, and resistance. The above equation is the modern form of ohm s law. To explore the time dependent behavior of rc and rl circuits prelab reading introduction when a battery is connected to a circuit consisting of wires and other circuit elements. A simple circuit is one that can be reduced to an equivalent circuit containing a single resistance and a. The overall experiment went well, and it succeeded the purpose of the trial which was how changing the voltage could affect the amount of current flowing in a series circuit while being able to prove ohms law. Introduction ohms law our main purpose in the ohms law part of the experiment is for you to gain experience. Ohms law experiment amr essam wasfy page 3 presented a slightly more complex equation than the one above see history section below to explain his experimental results. What ohm s law is and how to use it to understand electricity. Physics 263 sample lab report the attached lab report is an. You can also verify them from the basic ohm s law calculator. To investigate ohms law and to determine the resistance of a resistor.
Experiment 3 ohms law, measurement of voltage, current and. Lab report 18 ohms law experiment 18222 ohms law wanyi. A measure of how difficult it is for water to flow in a pipe. In the second part of the experiment, you will observe and verify ohms law in. Construct a circuit using resistors, wires and a breadboard from a circuit diagram. Ohms law and its applications are investigated in this experiment. This law states the relation among the three quantities voltage, current, and resistance. Direct constant dc circuits were built using dc power supplies and resistors in order to investigate the properties of resistance r. Calculations verification of ohm s law report the theoretical calculations are achieved from the original formula, v ir. Discussion ohms law discussion the purpose of this. Teet 3145 circuit analysis ii lab and eeng 2111 circuit analysis lab. Verification of ohms law, kirchoffs voltage law and. The objective of this lab is to determine the resistance of several resistors by applying ohms law. In this experiment, we were exploring the properties of ohms law by measuring.
What ohms law is and how to use it to understand electricity. Students will become familiar with dc potentiometers circuits and ohms law. Objectives in this experiment we want to verify ohms law by proving that the relation between the current in the circuit. Ohms law applies to all series, parallel, and series parallel circuits. Ohms law is an empirical formula which relates the voltage drop across a resistor to the current through it. For this experiment current controls need to be turned completely counterclockwise we will later adjust the current to 1a. Ohm law lab report college homework help and online. In this lab, you will use a variable power supply to subject a resistor of known resistance to a variety of voltages.
Appendix b, appendix c dmm objective the objective of this lab is to determine the resistance of several resistors by applying ohms law. Your objective will be to test ohms law, which asserts that the resulting current through the resistor as well as the rest of the circuit is proportional to the applied voltage. Ohms law and resistivity lab questions and results. A weakness in my experiment is my graph of the results. Print 1 copy of the report page to start your lab report. Become familiar with the behavior of some common circuit elements.
Experiment 3 ohms law, measurement of voltage, current. The dependence of the current through the component on the voltage across a component will. This relationship between current, voltage, and relationship was discovered by german scientist georg simon ohm. Ohm s law experiment amr essam wasfy page 3 presented a slightly more complex equation than the one above see history section below to explain his experimental results. Ohm expressed his discovery in the form of a simple equation, describing how voltage, current, and resistance relate to each other. Wires have resistance that depend on wire size, length, and type of material. Voltage controls completely clockwise notice that there is a. Calculations verification of ohms law report the theoretical calculations are achieved from the original formula, v ir. To verify ohms law, the mathematical relationship among current. Is ohms law universal, is it approximate, or are there elements that do not obey it. Kirchoffs laws deal solely with current and voltage. Gain an understanding of ohms law, and some of the factors that might affect the resistance of a circuit element. Ohms law can be used to identify the relationship between voltage, current, and resistance in any dc electrical circuit discovered by a german physicist named, georg ohm. Ohms law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit.
Experiment to show that i increases in direct proportion to v with the same r. Experiment investigate the validity of ohms law aim. Ohms law states that the current in an electric circuit is directly proportional to the voltage applied and inversely proportional to the resistance in the circuit. The article discusses the feasibility of returning to the original formula of ohms law, because it more clearly and adequately reflects the content of the process of the passage of electricity. According to ohm s law, a graph of current as a function of voltage an i vs. For the final part of the experiment, close out of the ohms law file, and open the second ohms law file. Discussion the purpose of this experiment was to verify ohms law, which states that the potential difference across a conductor and the current through it are directly proportional. A conductor has a resistance of one ohm if a potential difference of one volt across the conductor results in. To verify kirchhoffs laws by comparing voltages obtained from a real circuit to those predicted by kirchhoffs laws. You will apply various voltages across the resistor or circuit using a power supply, and measure the current i through the resistor and the voltage. Measure the actual resistance, r, of the three resistors using the ohmmeter and record them in the table provided.
V ir where i is the current measured in units of amperes, i, v is the voltage in units of volts, v and r is the resistance in units of ohms. Voltage controls completely clockwise notice that there is a coarse and fine adjustment for both current and voltage. In this experiment you will verify ohms law in several different circuits using a current. Resistance, ohms law, and i v curves lab report studocu. The purpose of this report is to verify ohms law, kirchoffs current law and kirchoffs voltage law. When the green power button is pushed in, the power supply is on.
The ohms law formula i vr states that v and i are directly proportional for any one value of r. Ohms law is normally written as v ir 1 where r is the resistance of the resistor in ohm when potential difference v is in volt and current i in ampere a. Ohms law states that the current through a conductor between two points is directly proportional to the voltage across the two points. To measure the time constants associated with a discharging and charging rc resistivecapacitive, or resistorcapacitor circuit. In this experiment you will test whether a carbon resistor a common electronic component obeys ohms law by measuring the current and voltage and calculating the ratio of. Gustav kirchoff in partial fulfillment of the requirements for technology 1811 electronic circuit technology lecture section 001 lab section 001 performed on. Wires add series resistance to circuits, just as good and bad connections add also. Accumulator or battery eliminator, ammeter, voltmeter, rheostat, coil, connecting wires and key if necessary.
Resistance is the measure of difficulty regarding current flow through a circuit wire and is determined by type of material resistivity, the cross sectional area of the. In this experiment you will test whether a carbon resistor a common electronic component obeys ohm s law by measuring the current and voltage and calculating the ratio of. Ohms law simon ohms amazing experiment and results. In the second part of the experiment, you will observe and verify ohm s law in simple resistive circuits. Determine the nominal resistance for the three resistors. Vernier circuit board, labquest interface device, current probe, voltage probe, computer with. Current varies directly with applied voltage a change in the voltage applied to a circuit will cause the current flowing in the circuit to change. Objectives in this experiment we want to verify ohm s law by proving that the relation between the current in the circuit. Experiment 2 ohms law print 1 copy of the report page to start your lab report print 2 copies of the data page file object. Students will also be introduced to the resistor color code and refresh their graphing skills. The constant r represents the opposition to a flow of electrical charges in a conductor.
Ohm s law states that the amount of electric current through a conductor in a circuit is directly proportional to the voltage across it. Purpose in the first part of this experiment you will observe a fundamental property of superconductors, the levitation of a magnet by a superconductor, illustrating the meissner effect. According to the ohm s law, the electric current flowing through a conductor is directly proportional to the potential difference across its ends provided the physical conditions temperature, dimensions, pressure of the conductor remains the same. Calculate the current from a constant 5 volt input by using equation 1. Your lab report for this experiment should contain the following sections. From ohms law, the power dissipated in a resistor is. Leds are fragile and can only have a certain amount of current flowing through them before they burn out. Ohms law equation i current vvoltage r resistance ohms law is explained by the following statement. Resistance is a measure of how difficulty to flow current through the device. If a voltmeter is used to measure the voltage v across an unknown resistance r, and an ammeter is used to measure the current i through the same unknown resistance, then r would be given by r vi. Lab report of the ohms law experiment using bread board. View lab report lab report 18 ohms law from phys 221 at university of mississippi.
Ohms law lab report electrical resistance and conductance. Ohms law gives the relationship of current, voltage, and resistance. Amperes a amount of water flowing resistance a measure of how difficult it is for current to flow in a circuit. Experiment 18 222 ohms law wanyi wu wendy 0105683 partner.
Become familiar with the use of a digital voltmeter and a digital ammeter to measure dc voltage and current. Ohms law for electrical resistance, v ir, states the relationship between current, voltage, and electrical resistance. The real practically calculated red color vs the theoretical values blue are plotted on the graph. The fundamental relationship among voltage, current, and resistance was discovered by georg simon ohm. Aim of experiment the main purpose of this laboratory experiment is. For this experiment, we will be studying a material known to obey ohm s law. An ohms law experiment for this experiment, we want to use a 9 volt battery to power an led. This law states that voltage is equal to the product of the total current and the total resistance.
Apr 19, 2016 sample labreport on verfication of ohms law 1. The objective of this experiment is to use ohms law to determine the resistance of several individual resistors and the equivalent resistance of series and parallel combinations. Ohm s law equation i current vvoltage r resistance ohm s law is explained by the following statement. You can also verify them from the basic ohms law calculator. The current in a circuit is directly proportional to. To study ohms law for dc circuits, to learn basic construction and measurement of electric. According to the ohms law, the electric current flowing through a conductor is directly proportional to the potential difference across its ends provided the physical conditions temperature, dimensions, pressure of the conductor remains the same. The current of a conductor between two points demonstrates a voltage directly proportional to the current and inversely proportional to the resistance, and is defined by ohms law. In the first part of this experiment you will observe a fundamental property of superconductors, the levitation of a magnet by a superconductor, illustrating the meissner effect. Ohms law iiiresistors in series and parallel however, all wires that make connections and the connections themselves qualify as series resistance. Ohms law deals with the relationship between voltage and current in an ideal conductor. Students will also be introduced to the resistor color code and.
According to ohms law, a graph of current as a function of voltage an i vs. Make sure the labpro interface is plugged into the usb port of the computer, its power supply is plugged in, and the interface is turned on. Resistance and ohms law university of minnesota duluth. If ohm s law holds, the ratio should be a constant. A simple circuit is one that can be reduced to an equivalent circuit containing a single resistance and a single voltage source. Experiment 2 ohm s law print 1 copy of the report page to start your lab report print 2 copies of the data page file object.
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