At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.

Correct Answer: Option B — there is no vertical component of the Earth's magnetic field

Magnetic dip represents the angle between the horizontal and the Earth's magnetic lines of force. At the magnetic equator, these lines are parallel to the Earth's surface, meaning the vertical component of the magnetic field is zero. Consequently, vertical soft iron cannot be induced with magnetism at this location.