Electromagnetic Induction

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AIM

To determine some conditions under which a magnetic effect will produce an electric effect; and to study the factors which affect the induction of a current in a conductor.

BACKGROUND INFORMATION

Experiments with magnetic fields show that an electric current in a wire has a magnetic field associated with it. If an electric effect can produce a magnetic effect, maybe the reverse may also be true, i.e. a magnetic effect may produce an electric current.

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APPARATUS

  • Ballistic galvanometer
  • Horseshoe magnet
  • Bar magnets
  • Leads
  • Wired metal rod
  • Induction coils
  • 60 microamp galvanometer

METHOD

  1. The coil was connected to a Microammeter. The N pole of the magnet was inserted into the solenoid and a description was recorded.
  2. The magnet was held stationary in the solenoid. A description of the results was recorded.
  3. The N pole was withdrawn from the solenoid and a description was recorded.
  4. Steps 1-3 were repeated with different speeds.
  5. Steps 1-4 were repeated with a magnet of a different strength.
  6. All observations were recorded.
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