Like I understand wattage and that a light bulb uses way less watts than say an electric dryer. But what causes less current to be supplied to the light bulb vs the dryer? I assume the power being supplied by the grid wants to force electricity out at a constant rate. So what is built into various circuits that causes the appliance to accept current at a higher or lower load? Is it simply just resistance? I can’t seem to wrap my head around this one.
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Imagine your attic is full of marbles. Those marbles are static because the floor is stopping them from falling into your house.
Imagine you drill a hole in your ceiling, now the marbles start falling. How fast they hit the floor is determined by how tall Your ceiling is. If you make the whole bigger, the balls don’t fall faster but more balls fall down.
In this (imperfect) analogy, the ceiling height is the voltage differential (120V for US) and the number of balls falling is the current (electrons). You can see how the current is only affected by the size of hole and not by how many marbles are actually in the attic.
Your appliance is analogous to the size of the hole so a small hole (light bulb) will only allow a small current and a big hole (a dryer) will allow tons of marbles.
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