Question

Voltages are always measured between two points.Why?​

Answer 1

➡Because voltage is a relative quantity. It's potential energy per unit charge, and potential energy is a relative thing.⬅

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Answer 2

Voltage is defined as the potential difference between two points, so two points are needed to measure voltage, one the reference, the other the point being measured. Thus, Voltages are always measured between two points.

• Voltage is also known as "potential difference."
• Because it is a relative phrase, it cannot be quantified at a single spot.
• We take another point at infinity even while computing potential differences at a single point.
• As a result, voltages are usually measured between two spots.
• The Volt is the unit of potential difference formed between two places, and it is commonly described as the potential difference dropped across a fixed resistance of one ohm with a current of one ampere running through it.
• In other terms, 1 Volt equals 1 Ampere multiplied by 1 Ohm or V = I*R.