on parallel circuits with input voltage, and multiple resistors in series, i've been struggling to understand why resistors don't simply add up. in this book it options 3 outcomes, of which don't unify. my only conclusion is that per resistor, to maintain voltage, amplitude must increase. i'm sure this is by volume of wire, ohms of wire, and by ohms of resistor. i just want to know that i'm on the right path, or i'm wrong. because its a book that is badly written to say the least. but i'm having a good time figuring it out.