I came across this wall wart which stated the secondary side rating in volt amperes too. Could some one please explain why?
Thanks in advance.

 

hi Yami,
Check this link, explains the effect of the type of load, ie: resistive etc.
https://en.wikipedia.org/wiki/Volt-ampere
E

 

That is indeed an odd way to state the output rating for an AC-DC adapter.
Usually VA is reserved for AC outputs.
It's just the output voltage times the output current, of course.