Question

The incorrect statement about a Zener diode is

• A. It is heavily doped
• B. The depletion region formed in it is very thick
• C. The electric field at its junction is extremely high
• D. In general, in a circuit it is reverse biased

Hint:

Remember the important properties of a Zener diode: \[ \boxed{ \begin{aligned} &\text{Heavy doping}, &\text{Thin depletion region}, &\text{High electric field}, &\text{Operated in reverse bias}. \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall the characteristics of a Zener diode. A Zener diode is \[ \boxed{\text{heavily doped}.} \] Because of heavy doping, \[ \boxed{\text{its depletion layer is very thin}.} \]

Step 2: State the other properties. Due to the thin depletion region, \[ \boxed{\text{the electric field across the junction is very high}.} \] Also, a Zener diode is normally operated in \[ \boxed{\text{reverse bias}.} \]

Step 3: Identify the incorrect statement. The statement \[ \boxed{\text{``The depletion region formed in it is very thick''}} \] is incorrect. Hence, the correct option is \(\boxed{(B)}\).