Nodal Analysis |||
Date of lab : 9/21/17
Overview
Testing a circuit containing multiple voltage sources. We will use nodal analysis to predict circuit behavior.
Pre Lab
Use nodal analysis techniques to predict the voltage V1 and current I1
Lab Procedures
1a) Measure and record all actual resistance
4.7k (resistor) = 4.4k (actual resistor)
1.5k (resistor) = 1k (actual resistor)
6.8k (resistor) = 6.4k (actual resistor)
20k (resistor) = 21k (actual resistor)
1b) Measure V1 and I1 in circuirt
V1 (recorded value) = 2.37 volts
 |
| V1 = 2.37 volts |
Percentage error from calculated V1 and recorded V1
((2.37-2.31) / (2.31)) * 100 = % 2.6 error
2) Picture of circuit
Comments
Since we had two given voltage sources next to nodes, then those nodes were equal to those voltage sources such as node V1 = 2 volts and node V2 = 5 volts. Since Voltage travels equally into parallel resistors, we can see that current is entering node V3 and then leaving node V3 toward V2 and ground.
We can confirm and visually see current flow using the EveryCircuit app below which also shows current at I1.
The TinkerCad app also confirms our calculated value of V1 and I1 and is a visual representation of our circuit for this lab.
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