passwella.
Menu

JAMB Physics 1980 Question 19

Question 19

Magnetism

The name given to the characteristic behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is

  1. A.magnetization
  2. B.paramagnetism
  3. C.diamagnetism
  4. D.demagnetization
  5. E.ferromagnetism.
Show the answer and explanation

Answer: C (diamagnetism)

Explanation

Diamagnetic materials are weakly repelled by a magnetic field, so a rod of such material turns to lie across the field. Paramagnetic and ferromagnetic rods line up along it.