IV Characteristics Practical

Characteristics of a Resistor

A resistor is connected into a circuit where an ammeter is used to measure the current through it and a voltmeter is used to measure the potential difference across it. In this experiment a variable power supply is used change these values before an IV graph is plotted.

Results Table and results.png
Results Table.png

Characteristics of a Resistor - RESULTS

These are the results from the previous practical - the shape of the IV graph allows you to identify the component.

Characteristics of a Lamp

This experiment uses a similar set-up to the previous experiment with a resistor - but we now investigate the characteristics of a filament lamp bulb.

Caution: The bulb may become hot!

Results Table and results.png
Results Table.png

Characteristics of a Lamp - RESULTS

The shape of this graph shows that its resistance is not constant - it increases with current.

Characteristics of a Diode

It is important to remember that we only connect the voltmeter across the diode in the circuit. The other resistor is just there to stop the circuit overheating.

Caution: Only keep the circuit switched on for a short time when a high current is measured!

Results Table and results.png
Results Table.png

Characteristics of a Diode - RESULTS

For these results I made sure that I used a suitable scale for the potential difference when I plotted this on the graph.

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