I feel like my knowledge of computer science is being hindered by this one concept. I understand the concepts of transistors and how a flow of electricity  can turn a transistor on or off, and with the power of logic gates, this can form the foundation of programming. What I do not understand is how these microscopic transistors are turned on or off, and how  electricity gets there in the first place. Thanks. 
How is electricity brought to the transistors?
memory hardware