Principles of Electricity and Electromagnetism |
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Page 387
... armature rotates is produced by a current i , flowing through the field coils which are wound on the pole pieces ... armature rotates . The reluctance of this gap is reduced by winding the armature on a steel drum with only a small ...
... armature rotates is produced by a current i , flowing through the field coils which are wound on the pole pieces ... armature rotates . The reluctance of this gap is reduced by winding the armature on a steel drum with only a small ...
Page 396
... armature circuit . Owing to the mechanical inertia of the rotating parts , the back emf . is not established at once , and while the motor is getting up to speed , an excessive current would be drawn by the armature windings . The ...
... armature circuit . Owing to the mechanical inertia of the rotating parts , the back emf . is not established at once , and while the motor is getting up to speed , an excessive current would be drawn by the armature windings . The ...
Page 418
... armature . 2. The drum armature of a two - pole generator has 12 coils of 20 turns apiece . Its effective length is 0.167 m . and its effective radius is 0.05 m . If it rotates in a region of uniform induction of 1 weber per square ...
... armature . 2. The drum armature of a two - pole generator has 12 coils of 20 turns apiece . Its effective length is 0.167 m . and its effective radius is 0.05 m . If it rotates in a region of uniform induction of 1 weber per square ...
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alternating current alternating-current ampere amplifier amplitude angle angular anode antenna applied approximately armature assumed atom axis calculated capacity cathode cell characteristic charge circuit coefficient coil component condenser conducting conductor considered constant curl current flowing curve deflection density determined dielectric dielectric constant direct-current direction dynamic resistance effective electric field electromagnetic electromotive force electrons electrostatic element energy equal equation flux force frequency function galvanometer grad harmonic hence impedance induction integral ions known length linear load magnetic field magnetic moment magnitude maximum measured meter negative obtained ohms oscillations output parallel phase plane plate current positive potential difference potentiometer quantities R₁ radiation radius ratio reactance region represents resistance resonant rotation scalar shown in Fig solution surface temperature terminals theorem torque transconductance triode tube unit vacuum tube vector velocity voltage volts wave wire written zero