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Jan24-13, 12:19 PM
P: 43
Thanks for the speedy response. How about when the magnetic field strength is increased to a huge amount whilst the current remains low?

Power = current * voltage = I V

I= Force/(magnetic field * arc length)

Warrington's formula for still air: V=28740*arc length/I^0.4

As current reduces, voltage increases less. Therefore increasing the magnetic field would reduce power asymptotically? Is the still air formula creating the problem here??