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JAMB Physics 1986 Question 48

Question 48

Magnetism

If the inclination at Ibadan is 7°S, this means that

  1. A.the angle between the geographic meridian and the magnetic meridian at Ibadan is 7°.
  2. B.the earth's resultant magnetic intensity at Ibadan makes angle 7° with the horizontal direction
  3. C.a magnetic needle will be inclined at 7° to the vertical at Ibadan
  4. D.the north pole of a magnetic needle dips downwards at Ibadan.
Show the answer and explanation

Answer: B (the earth's resultant magnetic intensity at Ibadan makes angle 7° with the horizontal direction)

Explanation

Inclination (dip) is the angle the earth's total field makes with the horizontal; 7°S means the south-seeking end dips.