This thread is going to be stale and unimaginative, don't look.

[Rapid_Roy]

It's emf = [Phi dN/dT - N dPhi/dt]

or since work is not done in the first term, -NdPhi/dT

Finally I have nothing to contribute to this thread...

Since work is not being done by me, I think this is the algorithm used to calculate the bearing expansion in a final drive.