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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 Power Pack Reading Voltage (V) Current (A) Resistance 2 0.65 0.06 10.83 4 2.36 0.27 8.74 6 3.92 0.45 8.71 8 5.94 0.70 8.49 10 7.58 0.90 8.42 12 9.35 1.09 8.58 Power Pack reading Voltage (V) Average Voltage* Current (A) Average Current** 1 0.01 0.01 0.01 0 0.01 0.01 0.01 0.01 2 0.34 0.33 0.34 0.3 0.2 0.2 0.2 0.20 3 0.6 0.59 0.54 0.6 0.27 0.25 0.25 0.26 4 2.07 2.12 2.10 2.1 0.41 0.41 0.14 0.41 5 3.08 3.07 3.06 3.1 0.49 0.49 0.49 0.49 6 4.04 4.04 4.04 4.0 0.56 0.56 0.56 0.56 7 4.91 4.93 4.94 4.9 0.61 0.61 0.62 0.61 8 5.98 6.02 6.02 6.0 0.68 0.68 0.68 0.68 9 6.90 6.88 6.93 6.9 0.73 0.73 0.73 0.73 10 7.81 7.82 7.82 7.8 0.78 0.78 0.78 0.78 11 8.69 8.70 8.71 8.7 0.83 0.83 0.83 0.83 12 9.61 9.57 9.61 9.6 0.87 0.87 0.87 0.87 *Rounded to 1d.p **Rounded to 2d.p Filament Lamp Filament Lamp Resistance Table Voltage (V) Current (A) Resistance 0.0 0.01 0 0.3 0.20 1.5 0.6 0.26 2.3 2.1 0.41 5.1 3.1 0.49 6.3 4.0 0.56 7.1 4.9 0.61 8.0 6.0 0.68 8.8 6.9 0.73 9.5 7.8 0.78 10.0 8.7 0.83 10.5 9.6 0.87 11.0 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 'resistor' experiment it nearly stays the same. Apart from the first reading the resistance is all in the...

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