Sorry for my bad English but i'm from Italy! I have a question about phase that i don't fully understand. I took this table from the allaboutcircuits.com e-book: Volume II - AC » REACTANCE AND IMPEDANCE -- R, L, AND C » Series R, L, and C For example, in the column R - Z it is 0° which means that current and voltage through the resistor are in phase. Right? But, for example, what does it mean 80.680° in the R - E column? Ok i know it comes from calculus (E=IZ) but strictly speaking about phase what does it mean? Thank you!