Just had this at school and don’t get it
In: 0
It means that if an electron were to go in the loop, it would end up at the same energy level as when it started.
Think about if this wasn’t true, you could create or destroy energy by moving electrons around in a circle!
E: If water falls 10m down and then is pumped 8m back up to the top, you would be really confused about how this is possible.
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