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2 Pages

L06_Kirchhoff~

Course: PHY 303L, Spring 2009
School: University of Texas
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Word Count: 284

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PHYS IUPUI 251 LAB Page 1 of 2 KIRCHHOFFS LAWS OBJECTIVE To calculate the currents in a multiloop circuit using Ohms Law and comparing the results to those calculated with Kirchhoffs Current and Voltage Laws EQUIPMENT 3 battery packs, circuit board, 2 white shunt connectors, 3 red 75- resistive connectors, multimeter THEORY Kirchhoffs Current Law: I = 0 at any node. Kirchhoffs Voltage Law: V = 0 around any...

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PHYS IUPUI 251 LAB Page 1 of 2 KIRCHHOFFS LAWS OBJECTIVE To calculate the currents in a multiloop circuit using Ohms Law and comparing the results to those calculated with Kirchhoffs Current and Voltage Laws EQUIPMENT 3 battery packs, circuit board, 2 white shunt connectors, 3 red 75- resistive connectors, multimeter THEORY Kirchhoffs Current Law: I = 0 at any node. Kirchhoffs Voltage Law: V = 0 around any loop. Ohms Law: V = IR for any resistor. PROCEDURE 1) Measure the resistance of each red connector (R1, R2, R3). 2) Set up the circuit shown below. 3) Measure the terminal voltage across each battery pack (E1, E2, E3) while they are powering the circuit board. 4) Measure the voltages across the red connectors (V1, V2, V3) and calculate their currents using Ohms Law: I1 = V1/R1, I2 = V2/R2, I3 = V3/R3. 5) Use Kirchhoffs Laws to calculate the currents I1, I2, and using I3 only resistances R1, R2, R3 and terminal voltages E1, E2, E3. 6) Compute the percent discrepancy between your results in Steps 4 and 5. E1 E3 red R1 V1 E2 red R2 V2 white white red R3 V3 IUPUI PHYS 251 LAB Name Partners Date Page 2 of 2 KIRCHHOFFS LAWS DATA SHEET Ohms Law results: R1 = ______________ R2 = ______________ R3 = ______________ V1 = ______________ V V2 = ______________ V V3 = ______________ V I1 = ______________ A I2 = ______________ A I3 = ______________ A Terminal voltages: E1 = ______________ V E2 = ______________ V E3 = ______________ V Show your Kirchhoffs Laws calculations on a separate sheet. Staple it to this sheet when you turn in your work. Final Results: Currents I1 I2 I3 Ohms Law Kirchhoffs Laws % discrepancy Use % discrepancy = 100 Meas Theo Theo where Meas = Ohms Law currents, and Theo = Kirchhoffs Laws currents
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