Statement-I : For faster action, n-p-n transistor is used
Statement-II : In n-p-n transistor, the mobility of majority charge carries is more.

Options

A. Statetment-I is True, Statement-II is True , Statement-II is a correct explanation for Statement-I
B. Statement-I is True, Statement-II is True , Statement-II is NOT a correct explanation for Statement-I
C. Statement-I is True, Statement-II is False
D. Statement-I is False, Statement-II is True

Answer

To analyze the statements provided in the question, we will break down each statement and evaluate their validity step by step.

### Step 1: Understand Statement-I
**Statement-I:** "For faster action, n-p-n transistor is used."

- **Analysis:** NPN transistors are known for their high speed and efficiency in switching applications. This is primarily due to the high mobility of electrons (the majority carriers in the N regions) compared to holes (the majority carriers in the P region). The structure of the NPN transistor allows for quicker response times, making it suitable for applications requiring fast switching.

### Step 2: Understand Statement-II
**Statement-II:** "In n-p-n transistor, the mobility of majority charge carriers is more."

- **Analysis:** In an NPN transistor, the majority charge carriers in the N regions are electrons, which have higher mobility compared to holes in the P region. This increased mobility of electrons contributes to the overall performance of the transistor, allowing it to operate more efficiently and quickly.

### Step 3: Conclusion
- Both statements are true.
- Statement II provides a correct explanation for Statement I. The high mobility of the majority charge carriers (electrons) in the NPN transistor is what allows it to be used for faster action.

### Final Answer:
Both Statement-I and Statement-II are true, and Statement-II is the correct explanation for Statement-I.

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