I like watching science videos on YouTube and I have a very basic understanding of electronics. But I never seem to get the “negative voltage” thing.
Why is it used and how does it differ from normal voltage.
In: 5
Voltage is a measure of the difference between electric potential(this is not potential energy) between two points.
Positive vs negative is a matter of comparison to a reference point, on the earth our reference point is simply the earth(hence the term ground) which is defined as 0.
In practice positive or negative simply denotes the direction in which current flows.
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