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Wave speed at different tensions of copper wire

  1. Apr 19, 2005 #1
    hi, sorry if this is in the wrong section, but im new to the forum!

    Im doing an A2 physics investigation, and have pretty much completed it all, an got a good set of results, but i need to prove that they are right!

    i have been using a simple set up by applying a 0.5A current through a SWG26 (0.45mm) copper wire, passed between two magnets, and applying varying tensions to it, to change the frequency at which it oscillates.

    i have done this, taken all of the required readings, and then used the following equation to find the natural frequency

    ƒ = 1 x √ T
    2l μ

    l – Length of wave
    ƒ - Frequency of oscillation
    T - Tension
    μ - Mass per unit length of the wire
    and 1 has been used to replace the wave speed, because i was given it in a txt book along with the equation

    i now need to prove that this equation is giving me the right results. I can apparently find whether it is or not by finding values for the velocity of waves through copper wire of the same gauge as mine (SWG26) at different tensions, but i have looked through text books and on the internet and cant find anything relavent, so i would be greatful if someone can give me some values for this, or anything that might help me find another way of proving my work (and preferably something or someone that i can reference in my work)

    if anyone can help and need more information about the experiment, just ask an ill post some more details.


  2. jcsd
  3. Apr 21, 2005 #2
    dont worry, ive sovled it now!
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