Casio fx-7400G PLUS Booklet

Also see for fx-7400G PLUS: User guide Product catalogue Specifications Specifications Programing manual

– 25 –Experiment 3Experiment 1 and Experiment 2 used resistors (carbon film resistors). In Experiment 3, we willuse a light bulb in place of resistance, whose filament acts as the resistance. Wire a diagramlike the one shown below.• Raising power supply voltage too high makes the light bulb very bright and very hot!• Do not raise power supply voltage over 4V.As with the previous experiments, this experiment studies the relationship between voltage andcurrent.Gradually raise the power supply voltage, measuring voltage and current on either side of thelight bulb. Raise the power supply voltage from 0V to 2V, in 0.2V increments, recording currentvalues as you go.Experiment 3 ResultsAnalysis – Step 1Use your graphic calculator to graph the results. In the STAT Mode, input the Voltage data intoList 1, and the Current data into List 2.Analysis – Step 2Now it’s time to move on to the next step. Is the graph produced by this Experiment differentfrom the graphs produced in Experiment 1 and Experiment 2? Write what you observe.The points in the graphs produced by Experiments 1 and 2 are linear and passthrough the origin, but the Experiment 3 graph is not linear.A_V_AmmeterPower SupplyVoltmeter Load(miniature bulb)R[Ω]Voltage (V) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0Current (A) 0 0.30 0.42 0.48 0.53 0.57 0.60 0.63 0.66 0.69 0.72EE-2 Ohm’s Law