Consider the following statements A and B and identify the correct answer : A: A Zener diode is always connected in reverse bias. B: The potential barrier of a P-n junction lies in between 0.1 to 0.7 volts, approximately.

Options

A. A is true, B is false
B. A is false, B is true
C. A and B are true
D. A and B are false

Answer

To solve the question, we need to analyze the two statements A and B regarding Zener diodes and the potential barrier of a P-N junction.

### Step 1: Analyze Statement A
Statement A states that "A Zener diode is always connected in reverse bias."

- **Explanation**: A Zener diode is specifically designed to operate in reverse bias. When reverse-biased, it allows current to flow when the voltage exceeds a certain value known as the Zener breakdown voltage. This characteristic makes it useful for voltage regulation in circuits.

**Conclusion for Statement A**: This statement is **correct**.

### Step 2: Analyze Statement B
Statement B states that "The potential barrier of a P-N junction lies in between 0.1 to 0.7 volts, approximately."

- **Explanation**: The potential barrier (or built-in potential) of a P-N junction depends on the materials used. For silicon, the potential barrier is typically around 0.6 to 0.7 volts, and for germanium, it is about 0.3 to 0.4 volts. The range mentioned in Statement B (0.1 to 0.7 volts) is misleading because it suggests a lower limit that does not accurately represent the typical values for common semiconductor materials.

**Conclusion for Statement B**: This statement is **incorrect**.

### Step 3: Identify the Correct Answer
Based on the analysis:
- Statement A is correct.
- Statement B is incorrect.

Thus, the correct answer is that **only Statement A is correct**.

### Final Answer
The correct answer is **Statement A is correct, Statement B is incorrect**.

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