How can people say that voltage is like a pressure. They also say that voltage can be seen as on how badly the electrons move. From my knowledge, voltage is the work done per unit charge and so if the work done is high then the voltage / potential difference is high. Also, what do we mean by per unit charge (is it 1 coulomb charge, or what should it be)? Tnx
Answer
Voltage is like pressure in a hydraulic or pneumatic system. If you have a small diameter pipe (or a high resistance wire), you will need more pressure (voltage) to get the same flow (current). Also, with more pressure (voltage) each unit of steam (charge) does more work.
By unit charge we mean some fixed charge, usually it is 1 coulomb, but for relative calculations you can take any fixed charge (say, 1 electron or 4200 electrons).
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