Asked in FBISE Physics 2022 SLO — Paper 2022Moderate

The potential difference across the silicon PN junction is:

Correct answer: B. 0.7 V

  • A. 0.3 V
  • B. 0.7 V
  • C. 0.5 V
  • D. 5.0 V

Explanation

The potential difference across a silicon PN junction is 0.7 volt.

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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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