Recent content by Jigga

  1. J

    Modelling the voltage measured across a dc motor

    So 10 ohms matches the peak current seen through the coil immediately during startup (6V/10 ohms = 0.6A) So I am mot seeing why the same situation (6V rather than 3V) does not exist during stall?
  2. J

    Audio/Video Can I use my CRO to view sound waves from an audio generator?

    <Moderator note: Moved from General Physics.> Hi there I have an audio generator (pic attached) with an internal speaker which is very low volume. I have a microphone and CRO and I would like to view the sound waves. The output on the audio generator says 600 ohms. Are these output terminals...
  3. J

    How does a Ruhmkorf coil produce radio waves?

    Does the spark frequency = the interruptor frequency = radio signal frequency. From the sources I have found these frequencies don't seem to match. We use a 9V DC one at school. Many Thanks
  4. J

    Law Conservation of Energy: Starting off a solution for 11b

    Homework Statement Homework Equations ΔEsystem + ΔEsurroundings =0 The Attempt at a Solution I have solved 11a and got 5m/s. I can do 11b just by just jumping to Ek = Fs (from the work kinetic energy theorem), but I would like to do it formally from first principles using the Law of...
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