Voltage and conductor contact

Discussion in 'General Electronics Chat' started by nDever, Sep 3, 2011.

  1. nDever

    Thread Starter Active Member

    Jan 13, 2011
    154
    4
    Hey guys,

    I have a question regarding a qualitative property of electricity.

    I understand that if a certain conductor, for example a battery cathode, has x voltage with respect to ground, and another conductor, for example a piece of copper wire, is connected to it (soldered, physically connected, etc.), then that wire has the same voltage as the battery cathode.

    What is happening at the molecular level? Are the electrons from the cathode and the wire being shared?
     
  2. iONic

    AAC Fanatic!

    Nov 16, 2007
    1,420
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    What we thought was solid, unmovable, is now liquid and fluid! ?
     
  3. #12

    Expert

    Nov 30, 2010
    16,337
    6,821
    Once the contact is made, electrons can flow to your meter by sneaking in between the atoms. In a DC (battery circuit) they only flow in one direction. Attaching the meter allows some electron movement. The meter is designed to show the voltage by measuring how many electrons flow per second through the internal resistance of the meter.
     
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