Certificates of deposit, or CDs, are fixed income investments that generally pay a set rate of interest over a fixed time period.
When referenced to the local common or ground, a common-mode signal appears on both lines of a two-wire cable, in-phase and with equal amplitudes. Technically, a common-mode voltage is one-half the vector sum of the voltages from each conductor of a balanced circuit to local ground or common.
VAC = Voltage, Alternating Current You can find this voltage in wall-outlets, the well-known mains voltage with 50 or 60Hz frequency or a Voltage coming from a mains' transformer secondary winding (opposite of VDC which comes from batteries or rectified and filtered supplies) VA = Volt x Amper, power when the voltage and the current is not in phase.