Hey Guys I am new to electronics and currently on the ohms law chapter on vol 1. I have a question about voltage and current, I read it somewhere in one of the chapters but I cannot find it. Is current always consistant throughout a circut whereas voltage will vary from one part of the circut to the other ? EDIT: Here are some other questions I am also puzzled about: What exactly is a voltage drop ? How do resistors work ? I know the type of material, its cross-section etc play a role. But is it because the electrons in resistors have a 'stronger' attractions to the protons hence more 'friction' = heat dissipation ?