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GENERAL PRINCIPLES OF MAGNETISM
Magnetic Flux 2 Magnetomotive Force 3 Con
Tractive Force of Magnets 29 Calculation
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absolute unit active conductors air gap alternating currents ampere turns armature bars armature conductors armature core armature current arrow back electromotive force brushes calculated centre commutator connected copper current of electricity curve cut the flux ductor dynamo dynamos and alternators dynes electric conductor electric current electromagnetic electromotive force induced equation exciting current external circuit field magnets flux F flux passes galvanometer Hence horse power hysteresis increase induced electromotive force induction inductor insulated leakage flux length mag ring magnet of Fig magnet poles magnetic circuit magnetic field magnetic flux magnetomotive force mags per square motive force motor moved North pole number of turns opposite direction pendulum permeability pole corners pole face pole horns position power wasted produced proportional reluctance resistance reversal right angles rotary force rotary magnetic field rotation round sec2 sectional area solenoid South pole square centimetre supposed surface tractive force unit pole volts watts wire wrought iron zero