Hi All, I've been having a debate regarding stored charge on a capacitor. In have been told that "a 15 pF capacitor charged to 4 volts stores 60 picocoulombs." I'd like to clarify whether physicists, rather than electrical engineers, would consider that to be a false statement. To my mind, the net charge on a capacitor is zero (same current goes in as comes out, there is no net charge stored). However, an electrical engineer uses Q=CV routinely and describes that capacitor as having charge. What that really means of course is the plates thave +Q and -Q respectively. So, my question is whether a true physicist would automatically assume that convention was being followed and assume, therefore, that the plates have +/- 60 picocoulombs on them (i.e. no net charge), or would they consider the statement to be false without knowing the context in which it was stated (in other words whether the statement, which is is standalone and made outside of any context, refers to the abolute value of charge on the two plates, or whehter it refers to net charge)? This comes down to a question whether context is important in making statements like that, and whether that context is assumed by a physicist from its content. Mark.