A magnet dropped through a copper tube falls slowly because:

  1. copper attracts magnets
  2. gravity is weaker in tubes
  3. air resistance is large
  4. induced currents in the tube create a field that opposes its motion
Answer

D) induced currents in the tube create a field that opposes its motion

Lenz's law (eddy currents). SLO P-09-E-41 · Understanding

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise