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JAMB Physics 2001 Question 50

Question 50

Magnetism

The magnetic force on a charged particle moving with velocity v is

  1. A.proportional to both the magnitude of the charge and the velocity v
  2. B.independent of the magnitude of the charge
  3. C.proportional to the velocity v only
  4. D.proportional to the magnitude of the charge only.
Show the answer and explanation

Answer: A (proportional to both the magnitude of the charge and the velocity v)

Explanation

F = qvB sin θ, so the force is proportional to both the charge q and the velocity v.