Asked in FBISE Physics 2022 — Paper 2 2022Moderate

The knee voltage for Germanium is:

Correct answer: A. 0.3v

  • A. 0.3v
  • B. 0.5V
  • C. 0.7V
  • D. 1.1V

Explanation

The knee voltage for Germanium is approximately 0.3 volts. This is the point in the forward bias of a diode at which the current starts to increase rapidly.

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About PN Junction

A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.

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