Saw a 1930s poster warning about the dangers of electrocution and it had a red line (most probably the electricity) going from source to victim to ground. Why is that?
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One of the core properties of electricity is something called voltage. Voltage can sort be though of like electrical pressure. If you get a bunch of electricity in one area it has high voltage(not necessarily, but it helps with the analogy). Things with high voltage dont like to be in that state in a similar way to how a a container holding high pressure will want to equalize if given the chance. Ground basically has 0 voltage. If an object with high voltage has a path towards ground it will take it assuming the resistance isn’t super high. The electrical resistance of the human body is nowhere near high enough to prevent a high voltage line from going to ground, so all that electricity will run right through your body and kill you.
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