Table of Contents
Advertisement
Experiment #3 – Understanding Ohm's Law
Purpose:
This experiment demonstrates one of the basic laws of electronics - the relationship of voltage,
current and resistance called Ohm's Law. It uses the hydrogen that was created in Experiment
#2, so if you are not following Experiment #3 directly from Experiment #2, please repeat
Experiment #2 to create the hydrogen for this experiment.
Equipment:
1
PC computer with graphic software
1
Data Acquisition Card
1
Red test lead with alligator clip
1
Black test lead with alligator clip
2
10 ohm resistors
Setup:
Setup the equipment as shown below:
10 ohm
Load
resistor
1. Make sure that the fuel cell is fully hydrated with hydrogen stored from the previous
experiment in the hydrogen balloon.
2. Connect the USB cable between the circuit board and the computer and verify that the
green and blue LEDs on the circuit board are flashing.
3. Make sure the graphic software is running on the computer.
Voltage
Current
Input
Output
Figure 3.1 – Initial Test Setup
Fuel Cell
33
Oxygen
Tube
Hydrogen
Baloon
Advertisement
Table of Contents
