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Plot a graph of voltage (ordinate or vertical axis) and current (abscissa or horizontal axis), and determine the resistance constant value by computing the slope of the best straight line through the points.

Plot a graph of voltage (ordinate or vertical axis) and current (abscissa or horizontal axis), and determine the resistance constant value by computing the slope of the best straight line through the points.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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I want to solve a graph and discuss Ohm's law
Experiment number (1) Ohm's Law Objective: Verifying Ohm's Law and determine the resistance constant value. Apparatus: Power supply, ammeter, voltmeter, resistance, conducting wires. Theory: Georg Simon Ohm (1787-1854), a German physicist, discovered Ohm's law in 1826. This is an experimental law, valid for both alternating current (ac) and direct current (de) circuits. When you pass an electric current (I) through a resistance (R) there will be an electric potential difference (V) created across the resistance as shown below. Ohm's law gives a relationship between V, I aud R as follows. V=IR Units: V- volt (V), I- ampere (A), Rohm (N). So Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them. For Ohmic resistances, Vversus I is a lincar relationship, and they have a constant resistance. Resistance can be calculated using the Ohm's law, R = VII. The slope of the V versus I, line will also give the resistance, R. or non-Ohmic resistances, V versus I is a non-linear relationship, and they have A varying resistance. The resistance at a particular point can be calculated using Ohm's law, R = V/I, where V and I are the voltage and current at that point.
Transcribed Image Text:Experiment number (1) Ohm's Law Objective: Verifying Ohm's Law and determine the resistance constant value. Apparatus: Power supply, ammeter, voltmeter, resistance, conducting wires. Theory: Georg Simon Ohm (1787-1854), a German physicist, discovered Ohm's law in 1826. This is an experimental law, valid for both alternating current (ac) and direct current (de) circuits. When you pass an electric current (I) through a resistance (R) there will be an electric potential difference (V) created across the resistance as shown below. Ohm's law gives a relationship between V, I aud R as follows. V=IR Units: V- volt (V), I- ampere (A), Rohm (N). So Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them. For Ohmic resistances, Vversus I is a lincar relationship, and they have a constant resistance. Resistance can be calculated using the Ohm's law, R = VII. The slope of the V versus I, line will also give the resistance, R. or non-Ohmic resistances, V versus I is a non-linear relationship, and they have A varying resistance. The resistance at a particular point can be calculated using Ohm's law, R = V/I, where V and I are the voltage and current at that point.
Stop - R V Hon-chumic A 2 6 ہم 8 +100 12 Fig (1): the relation between the Ohmic & non - Ohmic resistance. The electrical resistance (R) of a device is defined to be the ratio of the voltage (V) across the device to the current (i) through the device R = V/I. The unit of resistance, ohm (2, the Greek letter capital omega), is then defined to be the resistance when one volt exists across and one amp flows through the device, 2 = YIA. V Fig (2): circuit diagram I Procedures: i. Connect the apparatus as shown in Fig (2), The power supply (PS) has a control so that by rotating it the voltage across the resistor (and hence the current through the resistor) can be varied from zero to some maximum value. 2x A 2. Adjust the power supply to zero volts before connecting ,Then apply voltage vab:e at about (2, 4, 6, 8, 10) V intervals. 8x1₂-3 1X10² 1.Exlo 3. Notice the change in the current, then record readings of current for each value of applied voltage. Switch pler Calculation and results: Plot a graph of voltage (ordinate or vertical axis) and current (abscissa or horizontal axis), and determine the resistance constant value by computing the slope of the best straight line through the points. Slope V/I=Rn
Transcribed Image Text:Stop - R V Hon-chumic A 2 6 ہم 8 +100 12 Fig (1): the relation between the Ohmic & non - Ohmic resistance. The electrical resistance (R) of a device is defined to be the ratio of the voltage (V) across the device to the current (i) through the device R = V/I. The unit of resistance, ohm (2, the Greek letter capital omega), is then defined to be the resistance when one volt exists across and one amp flows through the device, 2 = YIA. V Fig (2): circuit diagram I Procedures: i. Connect the apparatus as shown in Fig (2), The power supply (PS) has a control so that by rotating it the voltage across the resistor (and hence the current through the resistor) can be varied from zero to some maximum value. 2x A 2. Adjust the power supply to zero volts before connecting ,Then apply voltage vab:e at about (2, 4, 6, 8, 10) V intervals. 8x1₂-3 1X10² 1.Exlo 3. Notice the change in the current, then record readings of current for each value of applied voltage. Switch pler Calculation and results: Plot a graph of voltage (ordinate or vertical axis) and current (abscissa or horizontal axis), and determine the resistance constant value by computing the slope of the best straight line through the points. Slope V/I=Rn
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