Investigate how the resistance of an LDR varies with light intensity.
| Condition | Light % | Voltmeter (V) |
|---|---|---|
| No data recorded. Close switch to begin. | ||
Drag the correct standard circuit symbols into the empty boxes to complete the schematic for this experiment.
Formula: By voltage divider rules:
$V_{out} = V_{battery} \times \frac{R_{fixed}}{R_{fixed} + R_{LDR}}$
Therefore: $R_{LDR} = R_{fixed} \times (\frac{V_{battery}}{V_{out}} - 1)$