Day 5

Today we learned about nodal analysis and mesh analysis of DC circuits. 

Here we learned how to use nodal analysis to find voltages at the nodes. We selected the supernode as labeled and the reference node at the bottom branch of the circuit. 

The objective of this nodal analysis lab is to use nodal analysis to find voltages V1 and V2 as shown in the picture, then compare the results with measured voltages. 

Circled in green are the predicted voltages (should say "voltages predicted across..." Instead of "voltages measured across..."). The voltages measure are circled in black. 

Here is a picture as we measured V1 with the multimeter. The value is negative because the polarity is backwards. 

%error for V1 = 0% and %error for V2 = 1.04%. Any error in out measurements we believe may be due to our resistors not having the exact resistance. Since our error is small, we can conclude that nodal analysis does indeed work efficiently to predict voltages. 

Here we learned how to use mesh analysis to predict currents in the circuit pictured above.