A dip needle at a place is horizontal. The position of the plane will be at

Options

A. `60^(@)` angle of latitude
B. `50^(@)` angle of latitude
C. magnetic equator
D. magnetic pole

Answer

To solve the problem regarding the dip needle being horizontal, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Dip Needle**: A dip needle is a magnetized needle that can pivot freely and is used to measure the angle of dip, which indicates the inclination of the Earth's magnetic field at a specific location.

2. **Definition of Angle of Dip**: The angle of dip (or magnetic dip) is the angle that the Earth's magnetic field makes with the horizontal plane. If the dip needle is horizontal, it means that the angle of dip is 0°.

3. **Magnetic Field Components**: The Earth's magnetic field can be decomposed into two components: a vertical component (Bv) and a horizontal component (Bh). When the dip needle is horizontal, it indicates that the vertical component is zero, and only the horizontal component is present.

4. **Location Analysis**:
- At the **Magnetic Equator**, the angle of dip is 0° because the magnetic field lines are horizontal.
- At the **Magnetic Poles**, the angle of dip is 90° because the magnetic field lines are vertical.
- At latitudes like 60° or 50°, the angle of dip is positive, indicating a non-horizontal position.

5. **Conclusion**: Since the dip needle is horizontal, it must be located at the **Magnetic Equator** where the angle of dip is 0°.

### Final Answer:
The position of the plane will be at the **Magnetic Equator**.

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