Ohm's Law Experiment: Verifying Linearity through Current-Resistance Relation, Study notes of Law

Download Ohm's Law Experiment: Verifying Linearity through Current-Resistance Relation and more Study notes Law in PDF only on Docsity! Ohm's law experiment Amr Essam Wasfy Page 1 Contents  Introduction  Objectives  Equipment  Steps  Results  Comments Ohm's law experiment Amr Essam Wasfy Page 2 Introduction 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.[1] The mathematical equation that describes this relationship is:[2] Where I is the current through the resistance in units of amperes, V is the potential difference measured across the resistance in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.[3] The law was named after the German physicist Georg Ohm, who, in a treatise published in 1827, described measurements of applied voltage and current through simple electrical circuits containing various lengths of wire. He Ohm's law experiment Amr Essam Wasfy Page 5 Figure (2) Ohm's law experiment Amr Essam Wasfy Page 6  Then we will measure the current in the circuit, it will be zero as we didn't turn on the voltage source yet.  Then we will turn on the voltage source which connected to the circuit shown in figure (1), we will set it to supply the circuit with (2v), and we will measure the current in the circuit.  We will set the voltage source supply the circuit with (4,6,8,10v) and we will measure the current in each case.  We will note the measures we took an draw the grave between the voltage and the current.  Then we will calculate the slope of the grave it should equal the value of resistance we measured in the first step. Ohm's law experiment Amr Essam Wasfy Page 7 Results By measuring R=0.69 Slope = =0.66 kΩ 0.69 kΩ V 0 2 4 6 8 10 I 0 3 5.84 8.87 11.73 14.69