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Electric Pressure on a Charged Surface due to External EF

  1. Feb 8, 2016 #1

    Why he did not consider parallel force?Will parallel component of electric field not produce electric pressure on the surface?
  2. jcsd
  3. Feb 8, 2016 #2


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    The parallel component can only produce/result in a shearing force ; zero net pressure. Or put another way, it is orthogonal to the direction necessary to produce movement.
  4. Feb 8, 2016 #3
    You mean shear force does not exert pressure?
  5. Feb 8, 2016 #4


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    Shear force will be responsible for surface tension, as he said in the video. Pressure will be due to the force normal to the area.
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