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JAMB Physics 1991 Question 33

Question 33

Magnetism

Which of the following statements is CORRECT about the earth's magnetic field?

  1. A.The angle of dip is the angle which a freely suspended magnet makes with the vertical.
  2. B.The angle of declination is the angle between the magnetic meridian and the geographic meridian
  3. C.The angle of declination is the angle which a magnetic compass makes with the magnetic meridian
  4. D.The angle of inclination is the difference between the angle of dip and the angle of declination.
Show the answer and explanation

Answer: B (The angle of declination is the angle between the magnetic meridian and the geographic meridian)

Explanation

Declination is the angle between the magnetic meridian and the geographic meridian. Dip is measured from the horizontal, not the vertical.