Electronics is all related to Ohm's law. This provides the relation between voltage, current, and resistance in a circuit. The law states that the current passing through a resistor is directly proportional to the applied voltage across it. In mathematical forms, it looks like this:
A simple way to remember and apply it according to either of the variables is the following triangle:
If we want to find the current, we cover I and we get V divided by R. The same goes for R: we cover it and we obtain V divided by I. Lastly, V will equal I multiplied ...