Notes on Experiment #7

Week 7 Lab Sessions (2/26 and 2/28)

Yes. We are skipping experiment 6.

Be sure to print a copy of experiment #7 and bring it with you to your lab session. There will not be any copies available in the lab.


Prepare for this experiment!

During this experiment you will be building the most elaborate circuit of the term. (See Figure 1. below for circuit diagram and values.) You will also be measuring voltages and currents using all of the techniques we've learned this term. This will be great practice for the lab exam which will be later in the term. If you come to lab prepared you will finish early. If you do not prepare for this experiment you will not finish on time.

Measure the Resistors First!

The resistors must be accurate in this experiment. Discard any with an error greater than 5%. Ask your lab instructor for a replacement.

Procedure

We will do this experiment twice. The first time through we will use two pure DC sources. The second time through we will use one pure DC source and the function generator set to have pure DC.

For each case above we will measure and record all voltages using:

We will also directly measure and record the current in each element using the DMM. (That means each resistor and each source.)

Set up appropriate data tables for the expected data.

You will then compare this data to the calculated values from your circuit analysis and do error analysis.

Circuit Analysis

Use mesh analysis to determine the mesh currents. Then calculate each element current (including resistors and sources.) Now use Ohm's law to calculate each resistor voltage. You will be doing this twice!.

First time: Use the dual DC supply for the two pure DC sources.

Second time: Use the function generator for VS1 and one side of the dual DC supply for VS2. YOU MUST SET THE SOURCES BEFORE YOU CONNECT THEM TO THE CIRCUIT. WHY?

Figure 1.

Have fun.


Last modified: Thu Feb 21 13:31:42 2008