So current is just moving charges. Current is charge/unit time. Its how many charges move from A to B in one second for instance.
Voltage is potential energy. When you got a voltage it means that you have an electric potential difference. Lets look at a simple battery. A battery converts chemical energy into electric energy. The two ends of the battery point A and point B. So if there is a potential difference between A and B there is a potential for a current. All that means is that energy is available for a current to start.
One you connect the two ends of the battery charges will flow.
To look at a simple equation its Ohm’s law. R=U/I. R is the resistance of your wire for instance U is voltage and I is current. If you increase U and R stays the same I must increase. Which makes sense the more energy you got for a current you’ll have more current.
imagine a one way highway with cars
voltage is how fast the cars are going while
current is how many cars are there currently flowing through
to end it, resistance is how narrow/wide the highway is
higher voltage? cars go zoom
higher current? cars go slower because of a traffic jam, but you get more the amount of cars at the out end
higher resistance (narrower roads)? cars go slower because of less space to move
this is an oversimplification but is how I helped myself understand
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