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Are electromotive force(e.m.f) and potential difference same terms?Emotion: phone
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They are essentially the same. An analogy is water. Water in a piping system is made to move either by a pump, which is like an emf. Or by a difference in elevation, which is like a potential difference. In practice, what matters is that the water flows. Looking at a short section of pipe you can't really tell the difference between flowing water that is made to flow by a pump, or made to flow by a difference in elevation.

The electrons in a wiring system are made to flow either by an emf, or by a potential difference. In practice, what matters is that the electrons flow. Looking at a short section of wire, you can't really tell if what is causing the flow is an emf, or a potential difference.