Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator

Options

A. is always zero
B. can be zero at specific points
C. can b e positive or negative
D. is bounded.

Explanation

To solve the problem, we need to understand the concept of the angle of dip in relation to the Earth's magnetic field, specifically at the geographical equator.

### Step-by-Step Solution:

1. **Understanding the Angle of Dip**:
The angle of dip (or magnetic dip) is defined as the angle that the total magnetic field makes with the horizontal plane. It is measured from the horizontal component of the magnetic field to the total magnetic field vector.

2. **Magnetic Field Components**:
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