Question

In a Zener diode

• A. only $p$-region is heavily doped
• B. only $n$-region is heavily doped
• C. both $p\&n$ region are heavily doped
• D. both $p\&n$ region are lightly doped

Answer 1

Answer: (C)

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.