passwella.
Menu

JAMB Physics 1990 Question 34

Question 34

Magnetism

One of the properties of the earth's magnetic field is that the

  1. A.north pole lies in the northern hemisphere
  2. B.geographic and magnetic meridians coincide
  3. C.earth's magnetic flux is entirely horizontal at a place where the magnetic dip is zero
  4. D.earth's magnetic flux is entirely vertical at a place where the magnetic dip is zero.
Show the answer and explanation

Answer: C (earth's magnetic flux is entirely horizontal at a place where the magnetic dip is zero)

Explanation

Dip is the angle the field makes with the horizontal, so where the dip is zero (the magnetic equator) the field is entirely horizontal.