The voltageis denotedwiththe letterU
Its unit is the volt (in honor of Alessandro Volta) symbol V.
We can also use the derived units of the volt as the millivolt (mV),
the centivolt (cV), the decivolt (dV), the decavolt (dav) etc..
For the circuits studied in these lessons the most common derived unit
is the millivolt (mV): 1 V = 1000 mV.