1. LDRs and Thermistors

2. Light Dependent Resistor
What is an LDR?
Light Dependent Resistor
What does this mean?
The resistance of the component depends on the
intensity of the light falling on it

3. What is the symbol for an LDR?

4. As the light intensity increases
The resistance
decreases

5. Which line represents the VI characteristics of an LDR in the dark?
LDR in the light
Low resistance
LDR in the dark
High resistance

6. A component whose resistance changes
What is a thermistor?
A component whose resistance changes
as the temperature around it changes

7. What is the symbol for a thermistor?

8. For most thermistors the resistance decreases as the temperature
increases
This is not true for all thermistors though