A zener diode, when used in voltage stabilization circuits, is biased in 

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SDSC ISRO Technical Assistant Electronics 8 April 2018 Official Paper
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  1. Reverse bias region below the breakdown voltage
  2. Reverse breakdown region
  3. Forward bias region
  4. Forward bias constant current mode

Answer (Detailed Solution Below)

Option 2 : Reverse breakdown region
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Detailed Solution

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  • The forward voltage rating of Zener diode is the same as a normal diode
  • A zener diode is used as a voltage regulator in reversed biased where voltage across it remains constant as shown in the figure 
  • The slope (V/I) is positive
  • At reverse breakdown voltage (typically around 5V), there is a sharp breakdown at a reverse voltage as shown in the figure
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