In electrical engineering, ground or earth may be the reference point in an electrical circuit from which other voltages are measured, or a common return path for electric current, or a direct physical connection to the Earth.
This should help Untitled DocumentCan any one give a proper definition for GROUND(Gnd) in a circuit.....?
Correction: It sometimes means that. The fact is that many, perhaps most, people use the word without thinking (or understanding) what it does mean.In electronics ground means a reference point of a circuit from which all voltages are measured.
Astonishing.In electrical ground means ,it is connected to ground to draw the extra current from the short circuit ,leakage current etc
...How, exactly, does "ground" draw the extra current from anything?...
Ground is NOT a place where "good signals" go when they die...... In real life, ground conductors have both resistance and inductance and may also be carrying unpredictable currents which will give rise to voltage drops when they flow in the ground impedances...... Ground is a "dirty world". All voltages are differential.
The Ground in sense of Earth, drains extra electric charges by equalizing voltage between 2 bodyes ( Earth and equipment ).
We must consider the Earth ( in planet concept ) like a body with comparativelly infinite electric capacity, virtually able to drain all exceded charge from equipment, trying to redistribute its electrons equally.
=ckshivaram;905777]A "ground" in electric or electronic circuits, is a theoretical entity that is at zero volts everywhere. The Earth itself is often used as an approximation to this, and sometimes grounds are called "Earth" connections. There is only one ideal ground.
So does the negative pole of any source. "Ground has nothing to do with it.It is useful to think of some of the different functions of a ground:
1. A ground provides a return path for current
When, and only when, the "ground"is Earth.3. A ground provides a safety connection for metal enclosures
It is not necessary for such screens to be connected to Earth, or whatever it is you call "ground".4. A ground provides a shield to screen out electromagnetic noise, as in a coaxial cable or Faraday cage
No. Mobile antennas, i.e. those mounted on a vehicle usually, but not always, do. Frame, or loop, antennas do not. Yagi antennas do not. Quad, or cubical quad antennas do not. Many broadcast antennas are constructed on the Earth's surface and need no "ground plane".5. A ground plane is needed for an antenna to function properly
No. A thermal mass is used as a heat sink. Earth, or "ground", has nothing to do with it6. In electronic circuits, the ground is often used as a heat sink to dissipate heat from components
This does nothing to explain what Earth and/or "gound" is.It is often a good idea to use different "grounds" for different functions. For example in electrical wiring both the neutral and protective ground wires are ground connections, but one serves as a current return path and the other is a safety connection. There are very good practical reasons to have these implemented as two different wires.
What do you consider to be "real gound" and what is something you presumably consider to be "artifical ground"?In electronic circuits, different grounds are often used because real ground paths have resistance, inductance and capacitance and signals take time to travel from one part of the circuit to another--especially when thin copper traces are used on a circuit board.
This does nothing to explain what Earth and/or "ground" is.The primary concern in real-world grounding is considering current flow and current paths. For example in a PC board, power returns and high-speed clock signals usually use different copper ground traces than low-level audio or sensor signal reference grounds, so that the transient current from switching does not affect the ground reference for tiny signals. The grounds are tied together at one point, so that there is no circuit path for current to travel between the paths, but they are at the same potential voltage.
None of this would be necessary if we had an ideal ground--zero volts everywhere, with no impedance between any two points.
so is there any reasonable definition for ground.....?
you raised a question to every point written by almost everyone, but did not give your answer to it... what does this infer????
Ok. If you don't explain what they are, I can't address them.Syncopator, I have some objections regarding your previous explanations.
No diversion took place. I have simply responded to erroneous statements and misconceptions.However, ... you divert the subject to a personal course ...
I have written sufficient explanation regarding what "ground" is, and what it isn't.... you neither elaborated it and didn´t explained your reason to disagree ...
We can all live in hope.I hope my single contribution had been relevant to aid demetal.