I struggle to understand how if I increase the resistance in a circuit, it requires less current, based of ohms law.
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I = V/R This means that if you increase R, the circuit will have less current, but it doesn't mean the circuit will require less current. If you have any component that requires some kinda of current to work and u keep increasing your R, the component will not work the same way. So you have to calculate your R, based on how much current the circuit will need to work. Hope it clarifies you.
Picture a river flowing down a hill. The amount of water that flows is your current. The depth of the water is our voltage. Now build a damn across half of it. What happens?
The water meets more resistance at the damn so less water is flowing out.
(What then happens is that water backs up forming a lake. The depth of the water rises till the current is the same going in as going out. Rivers are a constant current source. Same thing in electronics. If you want the current to remain the same when the resistance increases you have to increase the voltage too.)
Maybe the misunderstanding is that you "need" less current. Think of it this way: Current is what you get for putting in Volt. You get less current.