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Eddy currents, friend or foe

Exercise and reference answers

Items
  1. Group
    Useful
    Item
    Train braking
  2. Group
    Useful
    Item
    Galvo damping
  3. Group
    Useful
    Item
    Melting metals
  4. Group
    Useful
    Item
    Power meter disc
  5. Group
    Harmful
    Item
    Hot core
  6. Group
    Harmful
    Item
    Wasted energy
  7. Group
    Harmful
    Item
    Core heating
Groups
  1. Item
    Useful
  2. Item
    Harmful
Instructions
Drop each item under useful or harmful.

Explanation

_Source: syllabus Physics Part I, Chapter 6, Electromagnetic Induction._
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