Magnetism and Electromagnetism
A permanent magnet

Attracts only ferromagnetic substances
Attracts ferromagnetic substances and repels all others
Attracts all paramagnetic substances and repels others
Attracts some substances and repels others

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Magnetism and Electromagnetism
The magnetomotive force is

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

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