Objective: Measure the resistance of a conductor using a voltmeter and an ammeter. By averaging multiple measurements, the error is reduced and the understanding of the concept of resistance is deepened. Understanding resistance is a property of a conductor, regardless of whether the conductor resistance is energized or not. Master the principle of voltammetry resistance measurement. Materials: Battery holder, Batter, Switch, Lightbulb, Wires, Sliding rheostat, Voltmeter, Ammeter Figure 3.1 Theory Ohm's law states that the voltage across a conductor is proportional to the current through it. The proportionality constant is the resistance of the conductor. Both experiment and theory show that most ordinary metals obey ohm's law, ? ? ? Procedures 1. Measure resistance by color chart: Choose one of the resistors that you have been given. Using the chart in the end of this lab, decode the resistance value and record that value in the first column of Table 3.1. 2. Measure current: Connect the circuit as shown in Figure3.1. Move the slider of rheostat to observe the change in the Voltmeter and Ammeter. Record 10 different sets of current and voltage while sliding the rheostat. 3. Graph: Construct a graph of Voltage vs. Current. Using linear fitting