A line passing through places having zero value of magnetic dip is called

Options

A. isoclinic line
B. agonic line
C. isogonic line
D. aclinic line

Explanation

To solve the question "A line passing through places having zero value of magnetic dip is called," we need to understand the definitions of the terms related to magnetic dip.

### Step-by-Step Solution:

1. **Understanding Magnetic Dip**:
- Magnetic dip, or magnetic inclination, is the angle that the Earth's magnetic field makes with the horizontal plane. At certain locations on Earth, this angle can be zero.

2. **Identifying Lines Related to Magnetic Dip**:
- There are specific terms used to describe lines on the Earth's surface based on the values of magnetic dip:
- **Isoclinic Line**: A line connecting points of equal magnetic dip.
- **Isogonic Line**: A line connecting points of equal magnetic declination.
- **Aclinic Line**: A line connecting points where the magnetic dip is zero.

3. **Determining the Correct Answer**:
- Since we are looking for a line where the magnetic dip is zero, we focus on the definition of the aclinic line.
- The aclinic line is specifically defined as the line that passes through places where the magnetic dip is zero.

4. **Conclusion**:
- Therefore, the correct answer to the question is **Aclinic Line**.

### Final Answer:
The line passing through places having zero value of magnetic dip is called the **Aclinic Line**.

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