Question

Why is voltage always 0?

Answer 1

Voltage is not always 0. However, if you're asking why voltage sometimes seems to be zero in certain situations, it could be due to a few reasons:

1. Reference Point: Voltage is always measured relative to a reference point, often called "ground" or "0V". If the voltage you’re measuring is with respect to the same point you’re measuring from, the result might be 0V. For example, if you're measuring the voltage between two points that are at the same potential, the voltage difference will be 0V.
   

1. Open Circuits: In a circuit that is open (e.g., a switch is off), there is no path for current to flow, and the voltage can appear as 0V across certain components because there's no electrical difference.
   

1. Grounding: If a circuit is grounded properly, many points in the circuit might have a voltage of 0V relative to ground, especially if there's no current flow or if the power source is off.
   

1. Short Circuit: In case of a short circuit, where two points are directly connected with no resistance between them, the voltage difference between those points could drop to 0V, as there's no potential difference.
   

So, voltage is not inherently 0, but it can appear to be 0 in certain scenarios depending on where you're measuring and the condition of the circuit.