dann11
Full Member level 3
Hi! I know this is quite a very simple question, where we all know that once a circuit is open we can measure a voltage equals to the supply voltage while the current is zero, but I want to fully understand why and how? why is the voltage be equals to the supply voltage at components before the portion where is cut. Like for example the simple circuit below. With ohms law, V=IR, if I = 0A, then the voltage should be zero as well, regardless of the resistance value, right?