is vac alternating current?
<answer> Yes, it is voltage of an alternating current waveform. <context> getting off track. So Vrms, Vdc, Vac -- Actually only the Vrms in this case is specific. Vac - is a generic ( ambiguous ) term for Voltage of an Alternating Current Waveform - the Current term is misleading as well - but that is what the world has settled on! -- V ac does not define how this is measured.