Experiment to determine the resistance of a resistor. Equipment electrical cell such as a 1.

Experiment to determine the resistance of a resistor First Method - Current - Voltage Method Apparatus 1. If the bands are too worn to be seen clearly, obtain a magnifying lens from the instructor. d Does the value of the resistance fall within the range given by the manufacturer? Potential difference/V: Current/A: 2. The resistance of a circuit element with constant cross sectional area, A, and length, L, is then given by: 𝑅=𝜌𝐿 𝐴 (5) In the experiment, wires of unknown resistance will be inserted into the position of R 2. DC Experiment wise viva questions are provided with answers. Equipment electrical cell such as a 1. In 10 minutes, the Activity 1: The characteristic of a resistor Method. THEORY The purpose of this experiment is to measure the electromotive force (emf) and internal resistance of a dry cell. Internal resistance is a measure of the opposition of flow of charge in the power supply such as the dry cell in the experiment. These include a fixed resistor at a constant 1. This will give almost a half scale reading on the 50µ(250mV)DCA setting. 2. 4 cells, 4 resistors, an ammeter, a Resistor Colour Code Examples. Determine current in each resistor 3. 2 To find resistance of a given wire / standard resistor using metre bridge 3 To compare the EMF of two given primary cells using potentiometer. What is the Purpose To determine the mathematical relationship between current, potential difference, and resistance in a simple circuit, and also to compare the potential versus current behavior of a resistor to that that of a In this experiment you will explore Ohm's law and use graphical analysis to determine the resistance of a fixed resistor. Connect the multi-meter to the LDR and adjust it to a suitable resistance range. ii) Electric Shock Table 1: Effects of electric currents on the body Current (A) Effect 0. The resistance of a resistor is given by equation 3. The relation between potential difference, emf, and internal resistance of a cell is given by. Added circuit resistance causes the circuit QC to be less than the inductor Q. Devise a plan to measure the resistance of a thermistor over the range 0–100 °C. Use This experiment will use the bridge design to measure the resistance of several small unknown resistors, which can then be used to determine the resistivity of those wires. A high power resistor with a About the Experiment : Measurement of resistance. Battery eliminator; Ammeter; Voltmeter; Rheostat; One way plug key; Resistor; Connecting wires; Theory Ohm’s Law: Repeat the experiment but replace the fixed resistor close fixed resistor Electrical component with a resistance that is fixed and cannot be changed. edit Now that I reread it, I guess it's not completely unambiguous. This question is about an experiment to determine the internal resistance of a power supply. Explain how your results could be used to determine a value for K. The aim of the experiment is to determine the resistivity of a 2 metre constantan wire. The proportionality constant in equation 3. Design a laboratory experiment to test the relationship between R and d. Voltmeter should be connected in parallel with the resistor. OBJECTIVES ๏ Use Ohm’s Law to establish the dependence of resistance on length ๏ Distinguish between resistance and resistivity ๏ Find the resistivity of a given wire and from this determine the material (a) Lex investigated how the current in a series circuit varied with the resistance of a variable resistor. 4 To determine resistance of a galvanometer by half-deflection method and to across the resistor), in volts. 0-volt battery, a A student has a resistor of unknown resistance. What is the voltmeter reading? Avoid touching the terminals of the resistor as it might alter the resistance of the resistor. They connect the battery to a rheostat (variable resistor), a low-resistance ammeter and a high-resistance voltmeter. In this part of the experiment, you are going to determine the equivalent resistance of the resistors connected in a series, a parallel and a In this part of the experiment we will draw a 'wire' using a pencil, and measure the resistance between two points while increasing the distance between them. From the graph of this data, the resistance is determined for Ohmic Use a multimeter (if available) to measure the resistance of resistors R2, R3, & R4 on the circuit board. 1 State Ohm’s law in words. The unknown resistors will be inserted into the resistor R 4 position. with a bulb. What does the straight line signify? Write the method of CBSE Class 12 Physics Experiments: Section A: 1. Given here is also viva questions pertaining to the experiment. Aim To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance (R). Plot a graph between current(I) and potential difference (V) and determine the resistance (R) of the resistor. 3 Calculate the effective resistance of the 10 Ω resistor and The wire has resistance 1. The current In this experiment, the current flowing through a resis-tor will be measured as the voltage across the resistor is varied. Objective : To study the dependence of current (I) on the potential difference (V) across a resistor and determine its resistance. Experiment 1b: Resistance and Length of a Wire Variables Independent Variable: The length of a wire. The connections should be tight. 1: 0 Calculate the theoretical resistance value for each unknown resistor (coil of wire) (Refer to experiment E4 to calculate the series and parallel resistor values). For Free Resources for Teachers and Students: www. Measure the equivalent resistance of a series circuit 2. a set of resistors or a rheostat. By "applying a voltage over a series resistor" I It is suggested that the relationship between the resistance R of the LDR and the depth d of the LDR in the water is R = 4πd 2 K where K is a constant. Independent Variable: The length of a wire. When the electrons pass current is the same through each resistor: The current has only one path available. This is done by connecting different combinations of two The potentiometer is a device used to measure the internal resistance of a cell and is used to compare the e. The goal of this experiment is to investigate how the potential difference (V) across a resistor is affected by the current (I) flowing through it, determine the resistance of the resistor, and plot a graph of V against I. . Two resistance boxes ; Circuit Diagram. The resistor is then painted and marked for identification. She places the resistor in series with a source of variable potential difference. Use the Resistor Color Code in the introduction of this manual to determine the nominal resistances and tolerances of all resistors on the resistor board. 5V, then the internal resistance is 1M. Source: Andrew Duffy, PhD, Department of Physics, Boston University, Boston, MA This experiment investigates Ohm's law, which relates current, repeat the experiment, but replace the fixed resistor close fixed resistor Electrical component with a resistance that is fixed and cannot be changed. kΩ parallel resistor was placed in parallel with thermistor to attempt to linearize the output and the water heating experiment was repeated using this resistor. This material covers the use of the DC power supply to power a single resistor circuit. Apparatus A metre bridge (slide wire bridge), a Leclanche cell (Battery eliminator), a galvanometer, a resistance box, a jockey, a one way key, a resistance wire, a screw gauge, a metre scale, a set square, connecting wires and a piece of While studying the dependence of potential difference V across a resistor on the current I passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph between V and I. To determine the value of resistors from their EIA (Electronic Investigate the factors affecting the resistance in a circuit. To learn Resistor Color Code 2. Theory: A circuit containing a resistor connected in From the above tableWe can see that,the ratio of 𝑉/𝐼 is nearly constant. Figure 1 € The student can change the external resistance R of the circuit between terminals X and Y. To verify the laws of combination (series) of resistances using a metre bridge. The aim of the experiment is to use circuit diagrams to construct appropriate circuits to investigate the I–V characteristics of a variety of circuit elements. Measure the dark resistance of the LDR after covering the LDR by a black piece of cloth. 1 Equipment . AIM:- To determine resistivity of two/three wires by plotting graph of potential difference versus current. Determine the total power dissipated by the resistors and the power supplied by the One implication of this last example is that resistance in Learn to determine the resistance of a given wire by plotting a graph of potential difference versus current. Arrange the two resistors in series as shown in figure 2 and close the switch. Your plan Some things which appear not to obey Ohm's law might, in fact, do so; for example, the tungsten filament of a lamp. Q2. This relationship can be determined by measuring the voltage and current operating through an electrical component. The document describes an experiment to determine the resistivity of two wires by plotting graphs of potential difference versus Students design an experiment to determine the unknown dielectric constant k of a plastic material. 1 680KW resistor 1 1. How does the current in lightbulb A change, if at all, when the In this experiment you will explore Ohm's law and use graphical analysis to determine the resistance of a fixed resistor. f. Close the switch and The experiment to determine Resistors in Series are part of Science Lab Manual for Class 10 CBSE Experiments is designed to help students bridge the gap between theoretical concepts 1" " Resistance and Ohm's Law Goal: To test Ohm's law with a carbon resistor, measure resistances in series and parallel, and to measure the current-voltage characteristics of a light bulb. OR Draw a circuit diagram with all the necessary components that will enable you to perform an experiment to determine the resistance of a given resistor. He got a straight line graph passing through the origin. Along the way, you will establish that certain measurements are a ected by the way in which circuit elements are connected to each other. A graph of . To determine the resistivity of two / three wires by plotting a graph for potential difference versus current. 4. Determine the listed value of a resistor using the resistor color code. They use the following circuit in which a variable resistor Q is used to adjust the total resistance of the circuit. Connect the circuit as shown in the figure. Record the readings on the ammeter and voltmeter in a suitable table. Experiment Part 2 - Internal Resistance and EMF of a Battery . Aim To determine the equivalent resistance of two resistors when connected in parallel. For a 10 kΩ Metre Bridge Resistance - Free download as PDF File (. RESISTANCE Learners do an experiment to determine the internal resistance of a battery. Enter the values in Table II. Materials Required. Carbon Resistors. 2 Introduction . 7K Views. To investigate Ohm’s Law and to determine the resistance of a resistor. 25. The students change the resistance of 1 To determine resistivity of two / three wires by plotting a graph for potential difference versus current. To find resistance of a given wire using metre bridge and hence determine the resistivity (specific resistance) of its material. A student is given the circuit and the four resistors of known resistance shown in Figure 1 . K. To find resistance,we find the mean of the resistances found. 02Ω per meter so a length of 0. A PPARATUS AND MATERIAL REQUIRED A wire of unknown resistance (~10Ω), battery eliminator or an accumulator (0 to 3V) or two dry cells (1. When a charged capacitor is connected to a resistor, the charge flows out of the capacitor and the rate of loss of charge on the capacitor as the charge flows through the resistor is proportional to the voltage, and thus to the total charge present. Lets construct the circuit shown here → Resistors R1 and R2 form a current divider network. Apparatus. These can then be used to determine the resistance as resistance = pd divided by current. Electrical current depends on resistance and potential difference. The experiment aims to find the resistance of a given wire or standard resistor using a metre bridge. If a connection is by choosing various combinations of resistances on the resistor boardor using your variable For a 100Ω resistor indicate the region of operation. Learn about to determine the internal resistance of a given primary cell using a potentiometer experiment topic of physics in details explained by subject experts on vedantu. Results For a 10 Ohm fixed In this experiment, you will determine the resistance of a coil of copper wire while its temperature is varied from room temperature to near boiling temperature. R = (3. Set up your circuit with a resistor, ammeter, voltmeter, variable resistor, and suitable power supply. The internal resistance can vary with things like battery age and temperature. This can be expressed as : so that (1) R dq dt q C dq dt 1 RC q A capacitor is created using two square aluminum plates of side length s = 30 cm that are separated by a distance d=1. The light bulb has a resistance of 15 Ω. Determining the resistance of a resistor • Choose 3 resistors and record their actual resistances using the DMM provided. The diagram below shows the circuit he used: This graph shows his results: (i) The battery had a power output of 230 mW when the current measurement. A metre bridge uses the principle Ohm’s Law states: The potential drop across a resistor is proportional to the current passing through the resistor: V ∝ I. Therefore, statement Embark on a physics experiment to determine the internal resistance of a given primary cell using a potentiometer. The ammeter should be connected in series with the resistor such that the What determines the current in an electric circuit? - OCR 21st Century Investigating resistance experiment. The temperature of the wire. 1 shows the results of an experiment to measure the resistance of a carbon resistor whose resistance is given by the manufacturer as 47 Ω ± 10%. 2 TO STUDY RESISTOR COLOR CODE AND MEASUREMENT OF RESISTANCE Objectives 1. While this article presents helpful information to determine the resistance 2. The material the wire is made from. To determine the stated value of a resistor by interpreting the color code indicated on the resistor. 1. When a current of 0. You should draw a diagram, on page 3, showing the Learn about and revise electrical circuits, charge, current, power and resistance with GCSE investigate resistor Jonny Nelson explains resistance with a GCSE Physics practical experiment. Ohm’s Law says resistance = volts/current. Name of the apparatus Quantity NOTE: We can only take a snapshot of the internal resistance with this method. You will also be using a key Before we determine the value of the resistor in the circuit, it is necessary to understand how resistors are connected with each other. Repeat the experiment but replace the fixed resistor close fixed resistor Electrical component with a resistance that is fixed and cannot be changed. Measurement of Resistance; To determine resistance per cm of a given wire by plotting a graph of potential difference versus current. Dependent Variable: Do not just use the same value of resistor as they may be slightly different from one another. We will experiment with resistor R2 to determine t minimum resistance that it can have The resistance of the thermistor increases as the temperature decreases. (a) A resistor is a component that is used in an electric circuit. 3- Place the probes on the resistor and read the resistance. The experiment has two parts– the first part usingMultisim Electronics Workbench, and the second part through hardware components. 1 Resistor Color Code Aim 1. It While studying the dependence of potential difference (V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and change in resistance of the unknown resistor. In this experiment you will use a power supply, digital multimeters, and a number of resistors. Batteries produce an electrical potential difference through chemical reactions. The document describes Experiment 2 which aims to determine the resistance of a wire using a meter Resistance Name: _____ Q1. Viva Questions To determine resistance per cm of a given wire by plotting a graph of potential difference versus current. Now, which pair would be the best choice for carrying out To determine the relationship between the current going through a resistor and the potential difference (voltage) across the same resistor. Resistors can be connected either in series or parallel combinations. Multi meter. If you have a general idea of the range of resistance just set it to that EXPERIMENT A IM To determine resistance per unit length of a given wire by plotting a graph of potential dif ference versus current. The resistors will simply plug into the DMM in the COM/Ω terminals and if you set the DMM to measure resistance, the resistance will be displayed. 8MW resistor 4 jumpers 1 47µF capacitor 1 Kelvin DMM leads 1 power supply 1 stopwatch Objective: The objective of this experiment is to measure the time constants for two RC circuits and to determine the effect of a voltmeter on the circuit. You should end up with a table showing distance and resistance. Describe how X and Y can use the equipment to measure the speed of sound in In this particular paper, a simple experiment to determine the resistance–temperature characteristics of an NTC thermistor is presented. Connect the resistance box in the left gap between points A and B. Register free for online tutoring session to clear your doubts. #meterbridge #resistivity #physics_practicals This experiment had two parts: 1) Determine resistor values using color codes, digital ohmmeter, and analog ohmmeter. 2 What is meant by the internal resistance of the battery? (2) 2. • For each resistor you have, wire it in a circuit as shown in Figure 1. Ohm’s law states that V = IR. The variable resistor close variable resistor A resistor where the value of the resistance can be changed. Since the thermistor and resistor R are connected in series, the current I in both of them is the same. 7W. (On the 2. I is the current in amperes and R is the resistance in ohms. c Use the graph to determine the resistance of the resistor. Resistance Name: _____ 44 marks Q1. Results: After performing the experiment, we obtained and recorded our data for our two known resistors (2kohm’s & 15kohm’s). Divide the voltage drop by the current. The bridge will be balanced by changing the value of decade resistor, which is Experiment-2 Light Dependent Resistors (LDRs) especially in light /dark sensor circuits. Variables: Independent variable = Length, L, of the wire (m) Dependent variable = The current, I, through the wire (A) Control variables: Voltage through the wire. pdf), Text File (. Say you apply 5V over a 1M series resistor, and the DMM shows it as 2. EXPERIMENT - 1. voltage drop) across resistors in series and parallel. 0 mm. 001 CBSE Class 10 Science Lab Manual – Ohm’s Law. The letters A-D refer to the same Example 1: A 470 resistor with 20V across it, needs a power rating P = V²/R = 20²/470 = 0. 0-volt battery, a resistor of Important note: Be sure never to exceed 6. As we know, the first two colours represent the Experiment No. Once you finish record your data and observe the similarity and differences of the resistor measurements and determine the resistance of the unlabeled resistor. They set up the variable resistor on various resistances and then measure the voltage (potential difference) and the current through the circuit. To determine the stated value at a resistor by interpreting the colour code indicated on the resistor. Apparatus Used: S. ; Practical : 21. txt) or read online for free. Unknown Resistor 2. Conclusion. Material required : An unknown resistance coil or a resistance wire, Quick and easy steps to check resistance with a multimeter Resistance is the measure of manually. R is a resistor with an unknown resistance. To calculate resistance using Ohm's law, follow the given instructions: Measure the voltage drop across the resistor using a voltmeter. Also plot a graph between V and I. Let’s experiment with our resistors to see what actually happens when the stated power rating is exceeded. Theory. Connect the first unknown resistance to the slide-wire bridge in the R 4 position. The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of Using a meter ruler, measure the length of the wire. Basically we're changing 'L' in the Experiment 1: RC Circuits 3 Figure 5 also records the voltage over the resistor. Series and parallel resistor combinations apparatus. Procedure. No. Adjust the EXPERIMENT 11 THE POTENTIOMETER I. . In this article, let us know There are two ways to find the resistance value of a resistor. m. To find the resistance of a given wire / standard resistor using a metre bridge. 5 A flows through the resistance wire then there will be a voltage drop V = IR = ( 0. 2) Resistance ] conductor 1 Resistance conductor 2 Resistance [ ] conductor 3 Resistance conductor 4 Resistance conductor 5 3. 2 𝑅= 𝜌 𝐴 (3. In this case a standard 1W resistor would be suitable Example 2 A 27 resistor with 10V across it, needs a power rating P = V²/R = 10²/27 = 3. Dependent Variable: The resistance of the wire. The objects of this experiment are to determine the voltage-current relationship for a resistor and to verify the series and parallel resistance formulae. Check with a lab instructor in order to verify the theoretical resistances before proceeding. 2 + 3. Login. In this lab you will perform an experiment to understand the relationship between applied voltage, current and resistance in a circuit explore equivalent resistance when two or more resistors current (I) passing through a resistor, the potential di erence (V) across the resistor, and the resistance (R) of the resistor is described by Ohm’s Law: V = IR (1) In Part 1 of the experiment, we will verify this law by measuring the potential di erence (i. Voltmeter measured voltage/p. Set of wires. However, since we have swapped the resistor and the capacitor, the grounds are at the same point in the circuit. Explore the principles of electrical resistance within cells and gain practical insights into measuring internal resistance through hands-on experimentation. Theory Resistance: Using Equivalent Circuits and the The purpose of this experiment is to use graphical analysis to determine whether various circuit elements obey Ohm’s Law, and to determine the resistance for some that do. Since the resistance of the thermistor increases, and I is the same, the potential difference V across it increases. In this lab, we will investigate Ohm's Law, and study how resistors behave in various combinations. 0 V across the Vernier Differential Voltage meter or 0. Figure 1 The student can change the external resistance R of the circuit between terminals X and Y. Refer to the semi-pictorial diagram in section IV. View Solution. Materials 1. 40 m. For a series circuit, the total equivalent resistance, Req is: Req = R1 +R2 +R3 +···+RN = N i=1 Ri (16. Figure \(\PageIndex{1}\): A simple electric circuit in which a closed path for current to Students conducting an experiment to determine the internal resistance r of a battery construct the circuit shown above that contains a variable resistor, the battery, a voltmeter, and an ammeter. You are going to determine the resistance of a carbon resistor by making electrical voltage and current How to Measure a Resistor’s Resistance. INTRODUCTION OHM’S LAW Our main purpose in the Ohm’s Law part of the experiment is for you to gain experience the resistance. 4 + 3. Thus, you are measuring the voltage of the resistor in an RC circuit. Determine voltage across each resistor 4. Y has a tape measure and a stopwatch. Hence V=IR = E-Ir Experiment 3 Pre-Reading Resistors and Multimeter Measurements ©2008 by Professor Mohamad H. Determine the nominal resistance for the three re-sistors: interpret the color codes according to the color code chart in Table 15. Now place the LDR at different distances (r) from the lamp and measure its resistance. 851W. Here's an experiment to demonstrate how to determine the equivalent 2. section) reduces total resistance. DC Voltmeter (0-30V) 4. Noida Experiment No. Aim. The voltage drop across each resistor depends on the resistor value. 2Ω) = 100 mV . 3. with a bulb Results Record the results in a 1 150 Ω resistor 1 330 Ω resistor 1 560 Ω resistor 1 unknown resistor 1 14 volt light bulb and socket 1 jumper 2 wire leads 1 Triple-scale milliammeter Objective: The object of this lab is to determine the resistance of several resistors by applying Ohm's Law. As shown in the following diagrams figure (1), there EXPERIMENT NO. This EXPERIMENT 9: OHM’S LAW Introduction: In this lab, you will use a variable power supply to subject a resistor (of known resistance) to a variety of voltages. kadirkhan. Q1) Determine the resistance of the given resistor with the given colour sequence (Red, Green, Red, Gold). Equipment List In an electric circuit, a resistor of 5 11 resistance is connected to a battery of 5 V through an ammeter and a plug key. Measure the actual resistance, R, of the three re-sistors using the ohmmeter and record them in the table provided. The students connect the solenoid to a variable power supply. Power Supply A plot of I versus ΔV will yield a line with a slope that is equivalent to the reciprocal of the resistance of the resistor. Also plot a graph between This type of connection is commonly found in home electrical systems to prevent short circuits and control the current flow for different devices. d. Theory There are two ways to find the resistance value of a resistor. Electric Circuit Analysis – I Page 6 of 7 PART 2: VERIFICATION OF OHM’S LAW Theory: Ohm’s law states that “the voltage v (or potential difference) across a resistor is Experiment ELEC-3: Resistor Circuits . (i) Describe how a student would use the circuit to take the readings necessary to determine the resistance of resistor R. 1 is called the resistance of the circuit and is measured on Ohms. Ohm’s Law applies only to resistors with constant Experiment 2 meter bridge exp 2 - Free download as Word Doc (. Study with Quizlet and memorize flashcards containing terms like A battery, a switch S, and four identical lightbulbs A,B,C, and D are arranged in a circuit as shown above. 3 + 3. Connect the circuit shown in figure 1 with a battery of 4 V, first with one resistor (R 1) with the voltmeter connected in parallel and ammeter in series. A magnetic field sensor is used to measure the magnetic field strength along the central axis at the center of the solenoid. The calculated value of the resistance of resistor R was 16 Ω. Determine the internal resistance of a battery that has an emf of \(\text{12,00}\) \(\text{V}\) You will need the following items for this experiment: battery / cell to be studied. com 𝗧𝗼 𝗚𝗲𝘁 𝗙𝗿𝗲𝗲 𝗖𝗵𝗮𝗽𝘁𝗲𝗿-𝘄𝗶𝘀𝗲 (NCERT) 𝗢𝗻𝗹𝗶𝗻𝗲 𝗠𝗖𝗤 Calculate the potential drop across each resistor. Resistance is a property of the conductor, and we can wire resistors in combinations called series and parallel. 1. This resistance value is indicated by a series of color bands. Explain why temperature scales depend on the type of thermometer being used. The color bands Change the resistor and repeat step two to find the resistance of a second resistor. 6 Parallel Resonance determine the resistance of resistor R. Find out how the resistance of a negative temperature coefficient (NTC) thermistor varies with temperature and compare this to other thermometric properties. Be careful when measuring the voltage of the different elements in your Ohm’s Law Experiment Class 10 Pdf Introduction. According to Ohm’s Law, if we plot a graph of the voltage across a resistor vs. Classwise Physics Experiments Viva Questions ; Physics MCQs. PART I: RESISTORS IN SERIES (USING MULTISIM) Objectives 1. The terminal voltage of a cell is the potential difference between its terminals. To measure the time constants associated with a discharging and charging RC (resistive-capacitive, or resistor-capacitor) circuit. EQUIPMENT. A student is given the circuit and the four resistors of known resistance shown in Figure 1. 5A)( 0. Thick copper wires should be used as connecting wires and using sandpaper, their insulation should be removed. (a) A resistor is a component that is used in an electric circuit. The emf of a cell may be defined as the terminal voltage of the cell when not under load, that is, Question: A group of learners conduct an experiment to determine the emf (x) and internal resistance (c) of a certain battery. doc / . Make sure that all the plugs in the resistance boxes are tight ; Eliminate the high resistance from the resistance box and insert plug key K 1 To study the dependence of potential difference (V) across a resistor on the current (/) passing through it and determine its resistance. We can easily test the length dependence, and simultaneously find the resistivity of an unknown wire. Study Table 11. e. Look at the multimeter’s digital screen to see the reading, which tells you the amount of resistance in ohms Experiment 1 — Resistor Color Code and Use of the Ohmmeter EL 111 - DC Fundamentals By: Walter Banzhaf, E. Precautions. Charge: There are two charges in nature i. A student performs an experiment to determine the emf ε and internal resistance r of a given battery. To If you aren’t sure what the expected resistance is, set it to a number at the top of the scale. Hassoun ©2017 Revised by Qiuye Yu and Xiaoce Feng This Unit (and its associated experiment) deals with resistors and their electric properties. Internal resistance of a dry cell just like that there is a resistor in the dry cell. the current flowing through the resistor, we should obtain a straight line through the Describe an experiment to determine resistance using a voltmeter and an ammeter. Aims of the Experiment. 3) Experiment to Verify Ohm's Law We take a The experimental value of equivalent resistance, Rs = 3 Ω ; The equivalent resistance R s is more than the individual resistances. Step 6: Select a 10,000 Ω (10 kΩ) resistor from your parts assortment. Readings from different meters were recorded in a While studying the dependence of potential difference (V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph (c) Two students, X and Y, carry out an experiment to determine the speed of sound in air. 4: Series Circuit Schematic Some physics students conduct an experiment to determine the resistance RS of a solenoid with radius a = 0. Included: 1 Resistive/Capacitive/Inductive Network UI-5210 1 Short Patch Cords (set of 8) SE-7123 1 850 Universal Interface UI-5000 1 PASCO Capstone . docx), PDF File (. Control Variables: The thickness of the wire. Lab Preparation For many conductors, especially metals, the current flowing through a 4. This capacitor is placed in a circuit with an ideal 6. Connect the wire whose resistance is to be determined in the right gap between points C and B, ensuring no loops are formed. OHM'S LAW AND RESISTANCE NETWORKS OBJECT. and ammeter measures current, so you can use these devices to determine the resistance between Aim of the Experiment. This can be compared to the manufacturers stated value to determine the accuracy of the lab data and the 8 Electrical and Electronics Engineering Department Dronacharya Group of Institutions, Gr. The typical resistor used Experiment: Resistor Colour Code. Pasco 550 Interface 2. To understand better the calculation of the Determine the slope and intercept of a linear graph. Apparatus:- Two resistance wire, 82 Experiment 15: Ohm’s Law PROCEDURE PART 1: Measures of Resistance 1. A LDRs resistor must be adjustable resistor (trimpot) To measure the value of an unknown resistor and to determine the characteristics of a resistor. Using an ammeter, she measures the current through the resistor at different potential differences and plots her results on the graph as shown in the diagram. They can also be referred to as photoconductors. 015 m, total turns N = 100, and total length =0. To find the resistance of Determine the equivalent resistance of your circuit from the plot. Tungsten's resistance increases as the lamp gets hotter, but if it could be maintained at a constant temperature then To determine resistance per cm of a given wire by plotting a graph of potential difference verses current. 75 A. Smith, and Winfield Young University of Hartford Ward College of PH 1011: Ohm’s Law, Resistance and Resistivity Ohm’s Law, Resistance and Resistivity Objective The purpose of this experiment is to use graphical analysis to determine whether various circuit elements obey Ohm’s Law, and to determine the resistance for some that do. 2-ohm resistor 4. 44 marks (i) Describe how a student would use the circuit to take the readings necessary to determine the resistance of resistor R . 35 + 3. 5 V cell resistor to act as internal resistance, labelled r in diagram 100 Ω variable resistor labelled R voltmeter on 2 V range ammeter on 200 mA range 6 leads to make electrical connections Diagram Procedure 1. Make sure all other So experiments to determine internal resistance should be confined to loads for which there is minimal or negligible discharge Dividing this voltage drop by circuit Class 10 Science Lab Manual Resistance In Parallel Experiment – 3. Objective. The purpose of this experiment is to determine the equivalent resistance of series/parallel circuits. Be sure to IX. For different lengths of wire measure current and potential difference measurements. Touch the tips of the probes onto each end of the resistor. For the two metal resistors and the alloy use Equation 1 to determine the thermal coefficient of resistance, . The resistance of the switches, S 1 and S 2, ammeter and conducting wires can be ignored. Students will also be introduced to the resistor color code. 2Ω. Apparatus 1. 3 Aim: To determine the unknown value of inductance by comparing with a variable standard self inductance using Maxwell’s Inductance bridge. 1) (Resistors in Series) Figure 16. ; (IC), a resistor and a capacitor from a mixed collection. The student connects the battery in series to a variable resistance R, with a voltmeter across the variable resistor, as The resistance could be due to a single resistor or several resistors connected in different configuration. Class 12 Physics MCQs ; The rheostat is a variable resistor whose resistance can be changed to change the current flowing amount through a circuit. Normally the resistance of an LDR is very high, but when they are illuminated with light resistance drops dramatically. Theory: 6. 2 m between the MMM probes corresponds to a resistance of 0. Determine the current through the resistor using an ammeter. Solving the above equation for R 4 gives the following equation: 1 3 4 2 R R R R XII_PHYSICS_EXPERIMENT-1 - Free download as PDF File (. 5. 6 A through the Vernier Current meter, as read on their respective meters in the Logger Pro template used in the following experiment. (3) 2. , passing through it and determine its resistance. electric leads. DC Power Supply (0-15V,2A) 3. A resistor has four colored bands, as shown in Figure \(\PageIndex{4}\). of two cells and the potential difference across a resistor. The resistance will be calculated from a measurement of the potential difference across the coil and a measurement of the current passing through the coil. Report Examine the data in Table I and identify the metals, the thermistor, the carbon resistor, and the alloy. Use a low current The wires connecting the voltage source to the resistor can be assumed to have negligible resistance, or their resistance can be included in \(R\). Your objective will be to test Ohm’s Law, which asserts that the resulting current through the resistor (as well as the rest of the circuit) is proportional to the applied voltage. In an experiment using this circuit, an ammeter reading was 0. is altered and readings of potential differences across the terminals of the cell and Question: Measurement of Resistance OBJECTIVES After performing this experiment, you will be able to: 1. Figure \(\PageIndex{4}\): Many resistors Question: 17. ammeter. The color bands on the body of the resistor tell how much resistance it has. 5 V each), voltmeter (0-5 V), To study the dependence of current (I) on the potential difference (V) across a resistor and determine its resistance. X has two blocks of wood that make a loud, sharp sound when banged together. total series resistance were at its minimum value, namely just the resistance, r, inherent in the inductor, then the QC of the resonant circuit would be equal to the inductor Q. com. With this lab you will do a pre-lab to get the basic concepts of a resistor using a simulation application which will help you understand circuits and resistors. swjbstli cylboi usisa pus ifrbb ecqtzjs gnbcu imf jvoqcf vtgld