Magnetism Question 52

Question: Earth’s magnetic field always has a horizontal component except at or Horizontal component of earth’s magnetic field remains zero at

[CPMT 1971, 81, 83]

Options:

A) Equator

B) Magnetic poles

C) A latitude of $60^\circ$

D) An altitude of $60^\circ$

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Answer:

Correct Answer: B

Solution:

At magnetic poles, the angle of dip is 90o. Hence the horizontal ooooooooooooooooooocomponent $ B _{H}=B\cos \theta =0. $