MCQ
Earth's magnetic field always has a horizontal component except at or Horizontal component of earth's magnetic field remains zero at
  • A
    Equator
  • Magnetic poles
  • C
    A latitude of 60
  • D
    An altitude of 60

Answer

Correct option: B.
Magnetic poles
At magnetic poles, the angle of dip is 90 . Hence the horizontal component $B_H=B \cos \theta=0$.

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