OHM'S LAW
The intensity of current in an electrical circuit is equal to the voltage supplied by the battery divided by the resistance within the circuit.
V = I / R
The intensity of the current is directly proportional to the voltage, that is, if a battery provides a higher voltage, the current intensity increases.
The current intensity is inversely proportional to the resistance, that is, if we increase the resistance in the circuit, the opposition to the flow of electrons will also increase; hence, the intensity of the electric current will be lower.
Ohm triangle
To easily remember Ohm's law the Ohm's Law triangle is often used. The way this triangle works is simple, you just need to cover the magnitude you want to find out, then, the other two left will give you the key to the solution.
For example, if we want to calculate the intensity, we need to cover the letter I and we'll find out that it equals to V divided by R, and so on.