Why emf is measured in volt but not in newton?

Answer 1

Excellent question !

The answer is: Because, even though it's called a "force", it's not really a force, in
the proper sense of that word.

Since the early experimenters in electricity who made up the label, the concept of
'force' has been pretty well taken over by Physics, to mean actual physical force,
measured in Newtons, capable of accelerating masses, maintaining orbits, etc.
But we still humor the electrical guys, by keeping their old, quaint, comfortable
label for the magnitude of the fields that make electrons move.

There's still room for tradition in language, even where a computer might protest
its misuse. So we still have "electromotive force", "forceful personality", "a force
for Law and Order", and "La Forza del Destino".