Coulomb's Torsion Balance

Discussion in 'General Science' started by RRITESH KAKKAR, Dec 17, 2015.

  1. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
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    Hello,
    please explain how this device work
    Torsion Balance


     
  2. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
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    The operational definition of a coulomb as the unit of electrical charge (in terms of force generated between point charges) was found to be equal to an excess or deficiency of about 6,250,000,000,000,000,000 electrons.
    How the electron were counted?

    The few practical applications of static electricity include xerographic printing, the electrostatic air filter, and the high voltage Van de Graaff generator.

    source.
     
    Last edited: Dec 17, 2015
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  3. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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  4. profbuxton

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    Feb 21, 2014
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    One at a time!!
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    What is it that you need to have explained. Watch the video. Ask a specific question about what you saw in the video that you didn't understand.

    Note that the video does a poor job toward the end of explaining how the quantitative value of the proportionality constant was arrived at. It also ignores the fact that it has units (namely Nm²/C²).
     
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  6. WBahn

    Moderator

    Mar 31, 2012
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    A number of different works came together to come up with these numbers.

    For instance:

    The basic form of the relationship can be determined via the Coulomb Torsion Balance experiment.

    The ratio of the electron charge to the electron mass can be determined using the Helmholtz Coil experiment.

    The fact that charge is quantized can be determined via the Millikan Oil Drop experiment.

    The mass of an electron can be determined a few ways, such as with a Penning Trap.
     
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