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Question: Answered & Verified by Expert
In a Zener diode,
PhysicsSemiconductorsTS EAMCETTS EAMCET 2020 (11 Sep Shift 1)
Options:
  • A only p-region is heavily doped
  • B only $n$-region is heavily doped
  • C Both $p$ and $n$ regions are heavily doped
  • D Both $p$ and $n$ regions are lightly doped
Solution:
1575 Upvotes Verified Answer
The correct answer is: Both $p$ and $n$ regions are heavily doped
Zener diode is heavily dopped with both $p$ and $n$ region. This means that the behaviour of Zener diode in forward bias will be same while in reverse bias, their junction potential is increased. So, that when voltage crosses the breakdown voltage, then current through the Zener diode increases rapidly.

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