KIRCHOFFS-RULES - update

4 e f f e c t i v e resistor 72 part 2 1 draw a

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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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