Assertion : Electric field outside the conducting wire which carreis a constant is zero.
Reason : Net charge on conducting wire is zero.

Options

A. If both Assertion `&` Reason are True `&` the Reason is a correct explanantion of the Assertion
B. If both Assertion `&` Reason True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason is False
D. If both Assertion `&` Reason are False.

Answer

To analyze the assertion and reason provided in the question, we can break down the concepts step by step.

### Step 1: Understanding the Assertion
The assertion states that the electric field outside a conducting wire carrying a constant current is zero.

- **Explanation**: When a conducting wire carries a constant current, the charges (usually electrons) within the wire are in motion. However, the wire itself remains electrically neutral overall, meaning that the number of positive charges (protons) is equal to the number of negative charges (electrons). Since there is no net charge outside the wire, the electric field outside the wire is zero.

### Step 2: Understanding the Reason
The reason given is that the net charge on the conducting wire is zero.

- **Explanation**: In a conductor, when a current flows, the free electrons move, but they do not leave the conductor. The number of electrons (negative charges) moving in one direction is balanced by the positive charges (protons) that remain stationary. Therefore, the net charge remains zero, which is crucial for maintaining the electric field outside the wire at zero.

### Step 3: Connecting Assertion and Reason
Now we need to connect the assertion and the reason to determine if the reason supports the assertion.

- **Explanation**: The assertion is true because the electric field outside the conducting wire is indeed zero when it carries a constant current. The reason is also true as the net charge on the conducting wire is zero. Since the reason correctly explains why the assertion is true, we can conclude that both the assertion and reason are correct, and the reason provides a valid explanation for the assertion.

### Conclusion
Both the assertion and the reason are true, and the reason is a correct explanation for the assertion.

### Final Answer
- **Assertion**: True
- **Reason**: True
- **Explanation**: The net charge on the conducting wire is zero, which leads to the electric field outside the wire being zero when it carries a constant current.

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