State Ohm's law.

Ohm's Law states that the current passing through a conductor between two points is directly proportional to the voltage across the two points. This law is usually formulated as V = IR, where V is the voltage, I is the current, and R is the resistance.

Here are the steps to understand it:

1. Identify the three main components in the law: Voltage (V), Current (I), and Resistance (R).

2. Understand that the law establishes a direct proportionality between Voltage and Current, meaning that if one increases, the other one does too, as long as the Resistance remains constant.

3. The Resistance is the factor that opposes the flow of current. The higher the resistance, the lower the current for a given voltage.

4. The formula V = IR is used to calculate one of the three variables if the other two are known. For example, if you know the Voltage (V) and the Resistance (R), you can find the Current (I) by rearranging the formula to I = V/R.