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Potential Difference of Potential Electromotive force
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air gap alternating current ammeter ampere-hours amperes area of cross-section armature core arranged back e.m.f. ballistic galvanometer brushes cable carbon cell centimetre Clark cell commutator conductors connected connexions constant continuous current copper Crown 8vo current strength curve cylinder decrease deflexion determined difference of potential direction disc dynamo eddy currents energy equal external feeders field magnets filament given greater heat Hence hysteresis inch increase induced current induced e.m.f. insulated iron joules lamp leakage length lines of force loop machine magnet poles magnetic circuit magnetic effect magnetic field magnetic flux magnetising force measured meter motor moved needle number of lines number of turns Ohm's law ohms parallel passed permeability plates position produced proportional quantity of electricity represents result right angles ring rotation secondary self-induction shews shunt sine solenoid speed switch temperature tend terminals total induction unit varies voltmeter volts watts winding wire zero