Question:
The graph given below represents I-V characteristics of zener diode. The part of the characteristics curve that is most relevant for its operation as a voltage regulator is
The graph given below represents I-V characteristics of zener diode. The part of the characteristics curve that is most relevant for its operation as a voltage regulator is
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Zener Breakdown = Constant Voltage = Voltage Regulator.
Updated On: Apr 26, 2026
- ab
- bc
- cd
- de
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The Correct Option is D
Solution and Explanation
Step 1: Zener Operation
A Zener diode works as a voltage regulator only in the **reverse breakdown region**.
Step 2: Identifying Regions
- 'ab' and 'bc' are in the forward bias region. - 'cd' is the reverse bias region before breakdown (leakage current). - 'de' is the breakdown region where voltage remains almost constant despite large changes in current.
Step 3: Conclusion
Region 'de' is the regulation region.
Final Answer: (D)
A Zener diode works as a voltage regulator only in the **reverse breakdown region**.
Step 2: Identifying Regions
- 'ab' and 'bc' are in the forward bias region. - 'cd' is the reverse bias region before breakdown (leakage current). - 'de' is the breakdown region where voltage remains almost constant despite large changes in current.
Step 3: Conclusion
Region 'de' is the regulation region.
Final Answer: (D)
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