Why doesn’t current flow when I connect the positive pole of one battery to the negative pole of another? In the moment of contact, shouldn’t the electrons that are abundant in the negative pole want to rush to the positively charged pole of the other battery until the charge in both poles equalizes?
My mental model of a battery is a water tank that has a wall through the middle, giving it two partitions. One of them is full of water, the other empty. Now you can connect a hose from one end to the other and water will flow from full to empty until the water level equalizes. But if you connected the empty side of one tank to the full side of another tank, water would still flow. Clearly my model is flawed. Can someone explain? Thank you!
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Batteries release electrons through a chemical reaction. That chemical reaction can only take place when you complete the circuit. I.e connect the battery’s positive to it’s own negative.
Connecting the positive of one battery to the negative of another does not complete the circuit for either batteries, so the chemical reaction does not proceed and thus no electron flow/no current.
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