Which electrical properties does Ohm's Law relate and how?

Answer 1

Ohm's Law states that the voltage across a load in a circuit is equal to the product of the resistance of the load and the current flowing through it.

E = I * R
E ==> voltage
I ==> current
R ==> resistance

If you compare an electrical circuit to your household Plumbing, resistance is similar to a restriction or partial obstruction in the plumbing, like a partially open faucet, current is similar to the rate at which water flows through the plumbing or from the faucet, and voltage is comparable to the water pressure.

Answer 2

The law can be written as: V = IR (voltage = current times resistance). More than a "law", it's basically just the definition of resistance (it can be rewritten as R = V/I); however, it's extremely useful in the analysis of electrical circuits.