A worksheet that examines the electrical resistance of:
- Thermistors at different temperatures,
- Light-Dependent Resistors (LDRs) at different light levels.
The current-potential difference (current-voltage, I-R) graph for a thermistor at three different temperatures is analysed through structured questioning. Resistance is calculated using Ohm’s Law.
Data of resistances at varying temperatures for a thermistor is presented and students are asked to plot the graph and describe the pattern shown.
A plotted graph of resistances for varying light levels for an LDR is presented and students are asked to draw a line of best fit and describe the pattern shown.
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£3.00