Posterous theme by Cory Watilo

2.11 practical

2.11 practical

24 November 2010

10:15
· 2.11 describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how this can be investigated experimentally
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· Build the circuit using real components
· Use a power pack to provide the 0-12V variable dc voltage
· Connect to the two bottom terminals on the 10Ω variable resistor

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· Vary the voltage from 12V to 0V and fill in the results table
· Switch the terminals over on the power pack and repeat for negative voltages
· Repeat the experiment using a filament lamp instead of the resistor
· "Unhide" rows 9 to 13

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· Repeat the experiment using a diode connected in series with a 10Ω resistor (the resistor you used earlier in the experiment). Measure the voltage across the diode only (not the voltage across the diode and the resistor) Just fill in results for rows 9 to 20
· Open the graph tab in the spreadsheet

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· Print out a copy / take a screen shot of the graph for your notes

Click here to download:
V-I graphs - results and graph.xlsx (13 KB)
(download)

(download)