phy-112 lab 4 compound circuits

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Grand Canyon University *

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112

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Electrical Engineering

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Dec 6, 2023

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docx

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5

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PHY 112 L Name: Kyle Pfannkuch Class Day: Monday, 3:15 Professor: Lee Brown Lab 4: Compound Circuits 1. Testable Question: To measure and calculate currents and voltages in a compound circuit with 5 resistors and a singular battery. 2. Hypothesis: That both the currents and voltages can be calculated correctly using Ohms and Kirchhoff’s Law 3. Variables: Control(s): Resistors (Ω), Battery (V) Independent: Measured Resistance (Ω), Measured Currents (A), Measured Voltage (V)
PHY 112 L Dependent: Calculated Currents (A), Calculated Voltages (V) Control(s): Resistors (kiloohms), Battery (V) Independent: Measured Resistance (kiloohms), Measured Currents (mA) and Measured Voltage (V) Dependent: Calculated currents (mA) and Calculated voltage (V) 4. Experimental Design: i R ( Ω ) V (V) I (A) 1 – 8 R1 1 – 8 R2 1 – 8 R3 1 – 8 R4 1 – 8 R5 5. Materials: A bullet point list of items; prepared on your own. 5 different resistors Multimeter, voltmeter, and ammeter Wires Power Supply Alligator clips 6. Procedures: Draw circuit diagram and label resistors and battery Use multimeter to measure resistance along all resistors Connect and put together the circuit using alligator clips.
PHY 112 L Measure voltage and current across each resistor Calculate theoretical voltages and current across each resistor 7. Data Table: Compound Circuit Table: Measured Measured Measured Calculated Calculated % error % error i R i (k Ω ) V i (V) I i (mA) V i (V) I i (mA) Voltage Current R eq 0.39 1 0.242 6.19 23.5 6.99 25.6 11.4 8.2 2 0.275 3.79 12.6 4.76 13.8 20.4 8.7 3 0.346 2.52 6.82 3.94 7.28 36 6.3 4 0.569 2.54 3.61 3.88 4.46 34.5 19 5 0.107 1.07 10.2 1.09 11.7 1.8 12.8 Calculated R eq = 0.39 kiloohms % error Voltage = 20.8% % error Current = 11% 8. Analysis:
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