Which of the following is a Semiconductor?

  1. Plastic
  2. Aluminum
  3. Wood
  4. Germanium
Monis Rasool Professor Asked on 12th May 2015 in Technology.
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Option 4 ( Germanium ) is the right answer.

chemical symbol  –  Ge
This type of semiconductor material was used in many early devices from radar detection diodes to the first transistors. Diodes show a higher reverse conductivity and temperature coefficient meant that early transistors could suffer from thermal runaway. Offers a better charge carrier mobility than silicon and is therefore used for some RF devices. Not as widely used these days as better semiconductor materials are available. 

RE: Which of the following is a Semiconductor?

Harsh Vardhan Professor Answered on 13th May 2015.
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