Photo Resistor basics | What is Photo Resistor Dark Resistance
This page describes photo-resistor definition, photo-resistor dark resistance basics and equation of photo-resistor dark resistance.
What is Photo Resistor?:
The device whose resistance decreases with the increase in incident light is known as Photo-resistor. It is also known as LDR (Light Dependent Resistor) or Photoconductor. When the light falling on its surface increases, its resistance decreases leading to current flow in the circuit.
The figure-1 depicts typical components in a photoresistor.
What is Photo Resistor Dark Resistance and its equation
When the cell of photo-resistor is kept in the darkness, the resistance is referred as dark resistance.