Question

The vertical component of earth's magnetic field is zero at or The earth's magnetic field always has a vertical component except at the

• A. Magnetic poles
• B. Geographical poles
• C. Every place
• D. Magnetic equator

Answer 1

Answer: (D)

Magnetic equator

Answer 2

At magnetic equator, the angle of dip is 0^o. Hence the vertical component $V = I \sin \phi = 0$