To investigate the variation of current ( I ) with pd ( V ) for copper sulfate solution with copper electrodes
When a voltage source is connected to a voltameter containing copper electrodes in a copper sulfate solution a current flows through the solution. In this experiment we investigate how the current flowing through the solution varies with different voltages applied across it.
Procedure:
- Note that current is 0 when voltage is 0. Record values in a table as shown below.
- Click on the right hand side of the slider at the top to increase the voltage from the potentiometer
- Record the voltage and current readings from the voltmeter and ammeter
- Repeat steps 2 and 3 until you have six sets of readings.
- Set the slider to minimum
- Click on the "Increase supply voltage" button to get a new supply voltage and follow steps 2 to 4 to get another set of readings
Analysis:
Draw a graph of current (y-axis) against voltage to determine the relationship between them.
Note: Start both axes at zero. Draw a "best fit" straight line. What is the significance of the graph?
