Physics Lab3

# Physics Lab3 - Name Stephanie Leath Lab Partners Karen...

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Name: Stephanie Leath Lab Partners: Karen, Andrew, Taki, Mohamad Section: 016 Date: 2/10/2009 @ 1930 Title: The Relationship Between Current and Voltage In Ordinary Solid Matter Purpose: The purpose of this experiment is to observe how the flow of electrical current changes as the voltage across a given material changes. Procedure: Circuit #1: Resistors 1. Measure the voltage across the resistor and the resulting current for applied voltages ranging form –6 to +6 volts. 2. Repeat this procedure using a different resistor. Circuit #2 Filament Lamp 1. Remove the resistor and place a filament lamp in its place. Again, measure the voltage across the resistor and the resulting current for applied voltages ranging form –6 to +6 volts. Circuit # 3 Diode 1. Measure the resistance of the resistor using the digital multimeter in the ohmmeter mode. 2. Connect the circuit. 3. Measure V vs. I for voltages ranging form –6 to +0.6 volts. 4. To complete the circuit, remove the ammeter from the circuit and replace it with a banana cable. 5. Place the digital multimeter (acting as a voltmeter), place it parallel with the load resistor. 6. Again, measure the voltage for the diode and load resistor for applied voltages ranging from –6 to +6 volts. Formulas:

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V = IR Where: V is Electric potential I is current R is resistance Equation of a line: y=mx+b
Where: m is the slope of the line or, in this case I/V=R Diagram of apparatus: Schematic diagram of circuit used to measure the I-V characteristics of a resistor The schematic diagram of the circuit used to measure the I-V characteristics of a diode

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Physics Lab3 - Name Stephanie Leath Lab Partners Karen...

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