Why they use words "AC DC" (Alternating, Direct Current) for current and voltage? Why not using AV or DV?
In electrical engineering, we use the words 'AC' and 'DC' a lot. All of us know that AC stands for alternating current, and DC stands for direct current. But the strange thing is, that we use it before current and voltage.
We do not say, AC when we are talking about Alternating Current, or AV when we are talking about Alternating Voltage. Instead we say 'AC current' and 'AC voltage'.
This also applies for the DC. I think it is a matter of old literature, but I wonder if any one can give me the correct reason (may be historical) for this.
Initially it was ignorance , then it became a matter of convenience...
The terminologies did not change.. people still refer to it as AC voltage and DC voltage.. just like People refer to siemens as mho in some places..
It just became a standard term.