What does Rheostat controls? electron drift velocity or quantity of electrons?
We know I=nAve
n=quantity of electron
This question was posted by Chithraja. This is a common doubt arising naturally in the minds of children as well as adults who think. But they never ask, or if they ask the questions remain unanswered. I will explain the question itself first. When we switch on a bulb we get the energy. But what happens to the electricity [...]