Why do two 2V batteries in parallel have 2V while in series they produce 4V?

AI Thread Summary
Two 2V batteries in parallel maintain a total voltage of 2V because they share the same potential, similar to two vertical sticks at the same height. In contrast, when connected in series, the voltages add up, resulting in a total of 4V, akin to stacking the sticks where the height increases. The analogy of gravitational potential energy illustrates how potential varies with configuration. This concept highlights the fundamental difference in how voltage behaves in parallel versus series connections. Understanding this distinction is crucial for grasping basic electrical principles.
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Homework Statement


Can somebody help me understand why two 2V parallell batteries weill have the total voltage of 2 while two 2V batteries in series will have the total voltage of 4V? Is there a good analogy to help me understand?

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The Attempt at a Solution

 
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Make an analogy with gravitational potential energy. Near the surface of the Earth it depends upon vertical height. Take two vertical sticks of the same length. In parallel their tops have the same height (are at the same potential). Now put them in series. What's the potential at the top of the upper stick?
 
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