Voltage is always measured b/w two points why?
Answers
Answer:
voltage refers to the potential difference hence this difference means voltage is measured b/w two points
Answer:
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Explanation:
Technically, one could measure a voltage at a single point. But this would require the measuring device to have some kind of internal reference. When one simply says "voltage", they typically mean the potential difference between two points. But technically, simply saying voltage means the voltage or potential with reference to ground or absolute zero potential. So to measure absolute voltage, the meter would somehow have to "know" what zero volts looks like, and then compare that to what is at its probe. And this is not as easy as it sounds. Easier is to use one probe as a reference and the other as a voltage measurement. And this is adequate for 99.99% of voltage measurements, as circuit elements typically don't care what their absolute potential is, they only care what the potential DIFFERENCE is from one lead or point to another. A resistor that has one lead at 10V and the other at 12V(a 2V potential difference) will dissipate the same amount of heat and have the same current running through it as a resistor that has its leads connected to 6V and 8V. Different absolute potential, same potential difference.