Exp#3: Linear Circuit Theory And Experiment
1. Introduction
The most successful and decisive experimental investigations are closely coupled with
theoretical work and/or numerical simulations.
Explicit predictions can be tested and
compared with measurements (provided we have a mechanism in place for comparing
numbers in the first place, of course!), and with computer-based simulations.
All three of
these approaches have assumptions and simplifications built in, and none of them can
claim to give absolute truth in their result.
However, when theory and experiment in
combination agree sufficiently closely (What does this mean? Defined how?), one can
reasonably claim to have a predictive model that can be used in practical scientific and
engineering applications.
The particular example in this lab is a simple, steady-state circuit, whose properties can
readily be predicted, and that can be built and tested quickly.
We will build a two-step
voltage divider circuit, where a constant DC voltage is divided into two smaller values.
Circuits like this can be found embedded in much more complicated ones, and it is very
useful to be familiar with this type of operation.
First, we will do the theoretical work,
then build the physical circuit.