1) Go to the following web site:
http://micro.magnet.fsu.edu/electromag/java/ohmslaw/
2) Set the resistance at 100 Ohms. Vary the voltage between 10 volts and 100 volts, record the current. Plot voltage (on y-axis) vs. current (x-axis). Find the slope of the graph. What does the slope represent?
3) Set the resistance at 200 Ohms and repeat.
4) Set the resistance at 300 Ohms and repeat.
To be handed in from Lab 1: 3 graphs (calculate slope and explain slope).
Lab 2 - Electrical Circuits - Circuit Analysis
1) Go to the following web site:
http://www.article19.com/shockwave/oz.htm
2) Click on the various command buttons & become familiar with the workings of OHMZONE.
3) Put the DC supply on the circuit board (left side, centre).
4) Place two bulbs, a 10 Ohm resistor and a 20 Ohm resistor in parallel and a bulb and a 10 Ohm resistor in series. You can identify the resistance of the bulbs and the resistors by clicking on "pop up" and pointing at the electrical components.
5) Use the ammeter and the voltmeter to measure the current through and the voltage across each component in the electrical circuit.
6) Show the calculations (in detail with explanations) to determine total circuit resistance and voltage across and the current through each component of the circuit.
7) Please note that the circuit uses conventional electricity flow, not electron flow. When you click "visualize" be aware that electrons are flowing in the opposite directions to the arrows.
To be handed in from this lab: measured voltage across and current through each component of the circuit and details to show how to arrive at current and voltage by calculation.