Does the Earth surface act as a common node for grounded systems?

[Sad Moon]

Hi

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?

 

[mgb_phys]

Hi
I need an explanation of the Earth grounding in electric courses

Welcome toPF - you should post this in the HomeWork section

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

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

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

Yes although there are practical difficulties that mean it isn't that efficent.

 

[Sad Moon]

Thanks mgb_phys!

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

thanks a lot again