Investigating the Voltage - Current characteristics of a Resistor and a Filament Lamp

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Investigating the Voltage:Current characteristics of a Resistor and a Filament Lamp

Mr Lawrence’s Prediction

Both a resistor and a filament lamp obey Ohm’s law.

Ohm’s Law

As voltage doubles, so does the current for a conductor at a constant temperature.

Diagram for Experiments

Resistor

Filament Lamp

Results Table’s

Resistor

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Filament Lamp

Filament Lamp Resistance Table

Analysis

Graph 1 – Resistor

The graph for the resistor has a positive correlation. This means that when the current increases so does the voltage. There is a pattern on the Volatge:Current graph for the resistor. For example if we double the voltage then the current also doubles (Voltage 3 to 6, Current 0.35 to 0.7, see graph). This shows that the current through a resistor is proportional to the voltage across the resistor. If I look at the resistance for the ...

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