The concept of Ground in circuits

[dineshbabumm]

One very basic concept which was troubling me from the begining is the concept of ground in the circuit.Some say ground is a current returning path..

Literally it means having a zero potential.But in actual practice in circuits and all we are giving the negative end as the ground point,or in most of the cases its giving -ve point in the ground.
So this doens't mean we are giving zero potential,but instead we are giving certain amount of -ve potential for sure.For example in biasing the IC's and all we will give +ve point to Vcc and -ve point of the IC to ground.

The -ve terminal of the battery is given to the point where we connect the ground terminal.So this means we are not applying zero potential at all.But ground literally means zero potential. If we use battery,then where is the ground in that??

 

[Steven De Bock]

Re: Concept of Ground

Actuallly the only thing that matters are potential differences or voltage differences between 2 points. So a ground is only used as a reference.

For example when you say that a certain point is at 2V, it means that that point in your circuit is 2V above your reference when you choose your reference at 0V.

You can easily add a constant voltage at every point in your circuit, voltage differences remain the same. Adding a constant voltage only means that you didn't choose the ground to be at zero voltage, but at that constant voltage.

The most common choice for ground is 0V though.

 

[Mistico_Pereyra]

Re: Concept of Ground

Actuallly the only thing that matters are potential differences or voltage differences between 2 points. So a ground is only used as a reference.

That's true !!

You can set your reference whenever you want, and the responses must be the same!!

 

[teteamigo]

Re: Concept of Ground

The reference is only valid throughout electric field is conservative.

High frequency isn't the case.

But in infinitesimal space scale, electric field should continue to be conservative.
By this way appear new paths to close the mesh by where there isn't visible connection. And amazangly there isn't at first time any loss of energy, by this new paths. Then appeara the concepts of electromagnetic field energy storage/propagation in space, represented in transmission lines by capacitance&inductance.

By this way defining voltage potencials (relative to reference)

V1'=V1+C V2'=V2+C

In a mesh we have -V2'+V1'=VV <=>V1-V2 + (C-C)= VV <=>V1-V2=VV

VV->potencial difference between two points in same mesh

 

[Mr Cappuccino]

Re: Concept of Ground

Ground is simply a reference point ... the main thing is the Voltage difference ....

 

[tomandrosea]

Re: Concept of Ground

I think they ddin't give the exact answer .
search google using the key word "single suply op amp"