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LDRs are devices that change resistance when light falls on them.
DMM
LDR
You will gather data on intensity (lux) vs resistance. By using a bright light and moving away from the light at regular intervals.
Make a measure of the resistance and the lux reading at each interval.
Plot your data
1. How does the resistance change with light intensity?
2. At what resistance will an intensity of 350 lux give?
3. If you wnated a resistance of 2.3 k Ohm what brightness would this correspond to?
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