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A.C Sonometer experiment

  1. Jan 31, 2006 #1
    Sir,
    In an A.C Sonometer experiment, what is the principle on which the sonometer wire vibrates when an A.C voltage and a magnetic field is applied between any 2 points of the wire?
     
  2. jcsd
  3. Jan 31, 2006 #2
    The applied AC voltage generates a constantly varying magnetic field, which engages and reacts with the static external magnetic field, causing a force reaction in BOTH the AC wire and the external magnet. The wire, often being very thin and of a mass much lower than the external magnet, exhibits a noticable cyclic displacement.
    Careful measurements would show that the external magnet also vibrates from this scenario.
     
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