Concept:The angle of dip is the angle between the direction of Earth’s total magnetic field and the horizontal plane at a given place.
Explanation:Earth’s magnetic field is not completely horizontal except at the magnetic equator.
At any place, the total magnetic field makes a certain angle with the horizontal direction.
This angle is called the angle of dip, or magnetic inclination.
It is measured using a dip circle.
At the magnetic equator, the field is horizontal, so the angle of dip is
0∘.
At the magnetic poles, the field is vertical, so the angle of dip is
90∘.
The angle of contact is related to liquid surfaces, not magnetism.
The angle of declination is the horizontal angle between geographic north and magnetic north.
The magnetic meridian is a vertical plane, not an angle.
Therefore, the angle between the magnetic field direction and the horizontal is specifically called the angle of dip.
Answer:B. angle of dip