Assertion: Electric field intensity at a point due to a positive charge is always opposite in direction to electric field intensity due to negative charge, and it is independent to locațions of charges.
Reason: The direction of electric field due to a point charge is away from the positive charge and towards the negative charge along the line joining the point charge and location where the electric field is to be calculated.

Options

A. If both assertion and reason are correct and reason is a correct explanation of the assertion .
B. If both assertion and reason are correct but reason is not the correct explanation of assertion
C. If assertion is correct but reason is incorrect
D. If assertion is incorrect but reason is correct.

Answer

To analyze the given assertion and reason, let's break down the concepts step by step.

### Step 1: Understanding the Assertion
The assertion states that "Electric field intensity at a point due to a positive charge is always opposite in direction to electric field intensity due to negative charge, and it is independent of locations of charges."

- **Electric Field due to Positive Charge**: The electric field (E) due to a positive charge (Q) at a point in space is directed away from the charge.
- **Electric Field due to Negative Charge**: The electric field due to a negative charge is directed towards the charge.

**Conclusion for Step 1**: The first part of the assertion is correct, as the directions of the electric fields due to positive and negative charges are indeed opposite. However, the second part stating that it is independent of the locations of charges is incorrect because the electric field strength depends on the distance from the charge.

### Step 2: Understanding the Reason
The reason states that "The direction of electric field due to a point charge is away from the positive charge and towards the negative charge along the line joining the point charge and location where the electric field is to be calculated."

- This statement accurately describes the behavior of electric fields. The electric field lines point away from positive charges and towards negative charges.

**Conclusion for Step 2**: The reason is correct as it aligns with the fundamental definition of electric fields.

### Final Conclusion
- **Assertion**: Incorrect (because it incorrectly states that the electric field is independent of the location of the charges).
- **Reason**: Correct (accurately describes the direction of electric fields).

### Answer
The correct answer is that the assertion is incorrect, but the reason is correct. Therefore, the correct option is D.

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