Electrodynamics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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ELECTRODYNAMICS | the science of electric charges in motion
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The Nature of an Electric Current | an electric current consists of a flow of charged particles, which may occur under th following conditions, 1. in a vacuum, 2. in a glass, 3. in an ionic solution 4. in a metallic conductor
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ELECTRIC CURRENT | in a solid conductor, consists of a flow of electrons only
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ELECTRIC CIRCUIT | defined as the path over which the current flows
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BATTERY | converts chemical energy to electrical energy
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GENERATOR | converts mechanical energy to electrical energy
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POTENTIAL DIFFERENCE | difference in electrical potential energy between two points in an electric circuit
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VOLT | (the unit of potential difference) which will maintain a current of ampere in a circuit whose resistance is one ohm
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ELECTROMOTIVE FORCE (emf) | applies to the maximum difference of potential between the terminals of a battery
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CURRENT | defined as the amount of electric charge flowing per second
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AMPERE | the unit of current
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RESISTANCE | is that property of the circuit which opposes or hinders the flow of an electric current
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OHM | the unit of electrical resistance
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The resistance of a conductor depends on | Material, (conductors, semi-conductors, insulators) Length, Cross-Sectional Area, and Temperature
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Dry Cell Battery | used in flashlights
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Wet Cell Battery | used as an automobile battery
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