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Unformatted text preview: tor of about 50 ohms and accurately measure its resistance using a DMM.
2. Setup the circuit shown in Fig 1. Wire a "good" 6 volt battery, resistor, and a switch in a series circuit.
3. Measure the "open circuit" voltage E of the battery. 4. Close the switch and measure the voltage Vab of the battery.
5. Calculate the current Mlowing through the circuit. 6. Repeat the measurements using a "bad" 6 volt battery. 7. Data Analysis and Results
7.1. Part #1
Present your results as follows: 1. Draw a schematic diagram of each circuit. 2. On each diagram, label all currents and voltage drops.
3. Present a table comparing theoretically and experimentally determined currents and voltage drops along with a calculation of the percent discrepancy.
Circuit #1 Resistance w/
DMM (ohms) Predicted
Current (A) Predicted
Voltage (V) Measured
Current (A) Measured
Voltage (V) Resistance w/
DMM (ohms) Predicted
Current (A) Predicted
Voltage (V) Measured
Current (A) Measured
Voltage (V) Resistor 1
Resistor 2
Resistor 3
Resistor 4
E f f e c t i v e Resistor Circuit #2
Resistor 1
Resistor 2
Resistor 3 PHY 2141/2181 EXP # 4 4 Circuit #2 Resistance w/
DMM (ohms) Predicted
Current (A) Predicted
Voltage (V) Measured
Current (A) Measured
Voltage (V) Resistor 4
E f f e c t i v e Resistor 7.2. Part #2
1. Draw a schematic diagram of your circuit and write down an equation stating Kirchoff's "loop" rule.
2. Solve the Kirchoff's loop rule equation for the terminal voltage .
3. State which conditions are necessary to have Vab=E, and relate this to the "open circuit" voltage of the battery.
4. Assuming that the "open circuit" voltage of the battery is equal to E, use the...
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 Fall '08
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 Physics, Resistance

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