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Exercise 3: Kirchoff’s Voltage Law Kirchoff’s Voltage Law is a simple statement of potential: traveling around a circuit and returning to the same point, through any path, must bring you back to the same potential. In our simple circuits, this means that the sum of the voltage drops across each load is equal to the voltage applied to the circuit. Create the following circuit on your breadboard: Verify the resistance rating of each resistor that you use: R1:______________ R2:______________ R3:_______________ Questions: 1. Measure and record the voltage supplied to the circuit:___________________. 2. Measure and record the voltage drop across each resistor: R1:____________________ R2:____________________ R3:____________________ 3. Is it true that the sum of the voltage drops across the circuit is equal the voltage applied to the circuit? ___________ 4. Verify that the voltage drop across each resistor is proportional to the ratio of its resistance to the total resistance: e.g., V R . Show your VR R R R 1 Tot calculations. 1 1 2 3 5. From a previous exercise, you know that the current is constant throughout this circuit. Break the circuit at any point and measure and record the current flowing:_________________. 6. If the total resistance is the sum of the resistance loads placed in series, verify that Ohm’s law holds for this circuit. Show your calculations. NOTE: The equivalent resistance in series will always be greater than any of the individual resistances.