Question

what does electromotive force represents

Answer 1

Electromotive force, abbreviated emf (denoted and measured in volts), is the electrical intensity or "pressure" developed by a source of electrical energy such as a battery or generator. ... (The word "force" in this case is not used to mean mechanical force, as may be measured in pounds or newtons.)

Answer 2

The change in flux is called electromotive force.

hope it helps you.