In basic terms, it’s a law that states that an electric current is proportional to voltage and also inversely proportional to resistance. It is the main aspect when you are dealing with electricity and the rules in Physics. It states that V = IR where the V is the voltage difference, I represents the current in amperes, and R is the resistance in ohms. You should use Ohm's law equation as the primary part as you seek the answers to your questions. Since most students often ignore this aspect, the use of the ohm's law problems and answers is often challenging.