Consider the following statements `A` and `B` and identify the correct answer
(A) A Zener diode is always connected in reverse bias to use it as voltage regulator.
(B) The potential barrier of a `p-n` junction lies between `0.1` to `0.3 V`, approximately.

Options

A. `A` and `B` are correct
B. `A` and `B` are wrong
C. `A` is correct but `B` is wrong
D. `A` is wrong but `B` is correct.

Answer

To solve the question, we need to analyze the two statements provided:

### Step 1: Analyze Statement A
**Statement A:** A Zener diode is always connected in reverse bias to use it as a voltage regulator.

- **Explanation:** A Zener diode is specifically designed to operate in reverse bias. When connected in reverse bias, it maintains a constant output voltage (known as the Zener voltage) across its terminals, even when the input voltage varies. This property makes it ideal for use in voltage regulation applications. Therefore, this statement is **True**.

### Step 2: Analyze Statement B
**Statement B:** The potential barrier of a p-n junction lies between 0.1 to 0.3 V, approximately.

- **Explanation:** The potential barrier of a p-n junction is typically in the range of 0.6 to 0.7 volts for silicon diodes, and can be higher for other semiconductor materials. The range of 0.1 to 0.3 volts is not accurate for p-n junctions. Therefore, this statement is **False**.

### Conclusion
- **Statement A:** True
- **Statement B:** False

Thus, the correct answer is that **Statement A is correct and Statement B is incorrect**.

### Final Answer
A is correct and B is incorrect.

---