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Help with earth grounding

  1. Jul 31, 2008 #1

    I need an explanation of the earth grounding in electric courses

    I can't appreciate the role of an earth grounding

    does the earth surface really act as a common node for all earth grounded systems?

    Can we then send a signal using one wire only??

    thanks in advance?
  2. jcsd
  3. Jul 31, 2008 #2


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    Welcome toPF - you should post this in the HomeWork section

    Yes - Remember that although the conductivity of earth isn't all that good, the cross sectional area is quite large.

    Yes although there are practical difficulties that mean it isn't that efficent.
  4. Aug 1, 2008 #3
    Thanks mgb_phys!

    I am a new member so sorry for not sticking to rules and conventions!

    thanks a lot again
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