Ohm's Law

Ohm's Law discusses the relationship between Voltage, Current and Resistance in electronic circuits. It states that current is directly proportional to voltage. And that current is inversely proportional to resistance. This means that in a circuit, if you increase voltage - current goes up. If you decrease voltage - current goes down. On the flip side of that - if you increase resistance - current goes down and if you decrease resistance - current goes up.

Note that in all cases - one of the attributes is constant, one is an independant variable and one is a dependant variable. So, in the instance where voltage is varied (the independant variable), resistance is constant and current is the dependant variable. In the instance where resistance is varied (the independant variable), voltage is held constant and current is the dependant variable.

The image below is sometimes referred to as the Ohm's Law Wheel. It shows the equations used to solve for one attribute as long as the other two are known. Note that the wheel more often than not - includes equations for Power as well. Power is not strictly part of Ohm's Law but it is related.

Ohm's Law Wheel