A particle passes undeflected through a velocity selector when:

  1. the magnetic force is twice the electric force
  2. it has no charge only
  3. both forces are zero
  4. the electric force equals the magnetic force in size and they act in opposite directions
Answer

D) the electric force equals the magnetic force in size and they act in opposite directions

qE = Bqv. SLO P-09-E-34 · Understanding

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise