A cell in which a semiconductor having a negative illumination coefficient of resistance is used is known as

A cell in which a semiconductor having a negative illumination coefficient of resistance is used is known as

Right Answer is:

Photo-conductive cell

SOLUTION

PHOTOCONDUCTIVE CELLS

  • A photoconductor is a bulk semiconductor device, whose resistance varies inversely when the light is incident on its surface.
  • All semiconductors can be considered photoconductors.
  • This is because any semiconductor will produce electron-hole pairs (EHP) when it is irradiated by electromagnetic radiation of the optical frequencies.
  • These include frequencies in the infrared, visible and ultraviolet radiations. 

  • The photoconductive cell is a  two-terminal semiconductor device whose resistance varies inversely with the intensity of light that falls upon its photosensitive material.
  • Does Glass Conduct Electricity?
  • These devices are also called photoresistive cells or photoresistors since the change in conductivity appears as a change in resistance.
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