Friday 11 August 2017

The Ground

This is the most important and basic thing, that every electronic engineer has to understand. The ground.

Many people just think that Ground is something that is Zero Volt. No, it's not. Speaking about voltage, it can also be called Potential Difference. Which means, the difference between two points, when measured, is what is known as Voltage. So it would be more helpful if one of these two points is a known one. And this known reference point is Ground.

The ground need not be Zero volts always. It can be any voltage from which you actually measure the intended thing. It is like you are measuring your height by standing on the ground, which serves as a base reference. However, you can also measure your height by stand on a chair or something. It is always the difference that matters.

So you can even take 200V as your reference and measure the voltage at 205, the potential difference is 5V and the ground here is 200V.

The ground also serves as a return path for the current to reach its source.

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