The following symbol is used for __________.

F1 Jai.P 29-12-20 Savita D4

This question was previously asked in
SSC JE EE Previous Paper 8 (Held on: 28 Oct 2020 Morning)
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  1. Tunnel diode
  2. Varactor diode
  3. Zener diode
  4. Photo diode

Answer (Detailed Solution Below)

Option 1 : Tunnel diode
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Detailed Solution

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  • A tunnel diode is a highly doped semiconductor diode.
  • The p-type and n-type semiconductor is heavily doped in a tunnel diode due to a greater number of impurities. Heavy doping results in a narrow depletion region.
  • When compared to a normal p-n junction diode, tunnel diode has a narrow depletion width.
  • The Fermi level moves in the conduction band on the n-side and inside the valence band on the p-side.
  • Below the Fermi level, all states are filled and above the Fermi level all states are empty

 

The tunnel diode is represented by the symbol

 

F1 P.Y Madhu 9.03.20 D10

The symbols of different diodes are given below.

Diode

Symbol

Tunnel diode

F1 P.Y Madhu 9.03.20 D10

Varactor diode

hark3

Zener diode

06.11.2018.001..08

Schottky diode

F1 S.B Pallavi 09.11.2019 D 3

Photo diode

F1 J.S 30.3.20 Pallavi D9

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