Thevenin's Theorem

At first, we used schematic to calculate V_th and R_th. V_th=0.4579V and R_th=7.7k-ohm

We set it up(1)

We set it up(2)

We got R_th of 7.4k-ohm

and got V_th of 0.46V

We selected 4.8l-ohm resistor as our load-resistor and got 0.75V across it.(However, our estimated V_th was 0.4579V)

Our measured values.

We collected some Voltage and Resistance data and used P=(V^2)/R to get their power and plotted against Voltage. (Graph seems wrong)

Summary: In this lab, we first calculated R_th and V_th of the circuit. and then we choose a resistor bigger than 4k-ohm and smaller than 10k-ohm(we used 4.8k-ohm) to measure its actual Voltage across its terminals, which were very different than V_th we calculated. And at last, we used Potentiometer to vary our resistance and gather some data of Voltage at different resistance and used it and equation P=(V^2)/R to plot Voltage vs. Power graph and tried to find a resistor that gives us maximum power at across terminals. However, we made mistakes and our graph looks very wrong.