The angle of dip is the angle

Options

A. Between the vertical component of earth's magnetic field and magnetic meridian
B. Between the vertical component of earth's magnetic field and geographical meridian
C. Between the earth's magnetic field direction and horizontal direction
D. Between the magnetic meridian and the geographical meridian

Answer

To solve the question regarding the angle of dip, we need to understand the definition and the context of the angle of dip in relation to the Earth's magnetic field.

### Step-by-Step Solution:

1. **Understanding the Angle of Dip**:
- The angle of dip, also known as the magnetic dip, is defined as the angle that the Earth's magnetic field makes with the horizontal plane.

2. **Components of Earth's Magnetic Field**:
- The Earth's magnetic field can be resolved into two components:
- The horizontal component (Bh) which lies in the horizontal plane.
- The vertical component (Bv) which points downwards into the Earth.

3. **Visualizing the Setup**:
- Imagine a vertical line representing the direction of the vertical component of the Earth's magnetic field (Bv) and a horizontal line representing the horizontal component (Bh).
- The angle formed between the horizontal line (Bh) and the resultant magnetic field (B) is the angle of dip (δ).

4. **Identifying the Correct Option**:
- Given the options in the question, we need to find which one correctly describes the angle of dip.
- The correct definition is that the angle of dip is the angle between the direction of the Earth's magnetic field and the horizontal direction.

5. **Conclusion**:
- Based on the understanding that the angle of dip is the angle between the magnetic field direction and the horizontal direction, we conclude that the correct option is the one that states this relationship.

### Final Answer:
The angle of dip is the angle between the direction of the Earth's magnetic field and the horizontal direction.