Magnetism and Electromagnetism
The force between two long parallel conductors is inversely proportional to

Product of current in two conductors
Radius of conductor
Current in one conductor
Distance between the conductors

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Magnetism and Electromagnetism
The magnetomotive force is

The sum of all currents embraced by one line of magnetic field
The flow of an electric current
The passage of magnetic field through an exciting coil
The voltage across the two ends of exciting coil

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