Labreport Ohms.pdf

Lab Report Research Question: To verify Ohm’s Law

Background Theory According to Ohm’s law, V is directly proportional to I where ‘V’ is the voltage and ‘I’ is the current flowing through the wire V=I*R where V is the terminal voltage of the circuit. I is the current flowing through the wire R is the resistance to the flow of current Variables: Independent : Current Dependent : Voltage Controlled : Power Supply, Resistance, type of wire Apparatus: Resistance Crocodile clips Copper wires Ammeter Voltmeter Rheostat Battery 1.Procedure 2.Connect the circuit diagram as shown in the diagram 3.Adjust rheostat to the extreme where the current is the lowest possible 4.Measure the current and voltage. 5.Use the rheostat to adjust the current

6.Repeat steps 2 and 3 while you reach the other extreme of the current 7.Plot the data on a V-I graph, with I on the x axis and and V on the y axis. 8.Draw a straight line of best fit that passes through the origin. 9.Calculate the slope of the graph using !

y2 − y1 x2 − x1

10. Calculate the resistance using the inverse of the slope Raw Data Table

Sr. No. 1