What is Ohm's law
What is Ohm's law
user
Hmm. Ohm's law?  That's an advanced physics topic.
assistant
Ok, but what is the law
user
It's called Ohm's law, because it was developed by Georg Ohm.  It states that the current I flowing through a resistor or electric circuit is proportional to the potential difference across the resistor or circuit (called the voltage) divided by the resistance of the resistor or circuit.  Since I is measured in amperes, the units on the right are volts/amperes.  It's important to be aware of the units of your parameters!
assistant
Ohm's law is a law stating that electric current is proportional to voltage and inversely proportional to resistance.
user
Great, you got it!  So you understand why it's important to know your units.
assistant
So what does resistance mean?
user
Resistance is measured in ohms, and is a measure of the electric potential difference needed to overcome the electrical resistance in a circuit.  The more resistance, the more potential difference needed.  This follows the equation 1/R = V/I.
assistant
The equation for resistance is R = V/I
user