Okay that's cleared some up for me, thanks!
Just an add-on, to make sure I've got this cemented:
Different countries, different interpretations, ultimately,
Lenzs Law Back emf = - di/dt is ΔΦB/Δt?
The di/dt is the same as Δi/Δt. its the rate of change of current with respect to time, whereas ΔΦB/Δt is the rate of change of magnetic flux with respect to time.
Also, either I haven't been exposed to the formula, or once again it's lost in translation..
[Vapplied -Vbemf]/Rmtr is derived from where? Is Vbemf regarded as a positive value, thus why it is subtracted and not added?
Its not a positive value, its in the opposite polarity to the applied voltage.
These queries seem awefully simple for these forums but the help is much appreciated.