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Electrodynamics The science of electric charges in motion
Electric current Consists of a flow of charged particles, which may occur under the following conditions in a vacuum, in a gas, in an ionic solution, in a metallic conductor
Electric circuit Is defined as the path over which the current flows
Cells/Batteries Convert chemical energy to electrical energy
Dynamo/Generator Converts mechanical energy to electrical energy
Potential difference Difference in potential energy between two points in an electric circuit
Volt Potential difference which will maintain a current of ampere in a circuit whose resistance is one ohm
Electric force Applies to the maximum difference of potential between the terminals of a battery
Current The amount of electric charge flowing per second unit of current is ampere
Ampere One coulomb quantity of electric charge flowing per second
Resistance Property of the circuit which opposes or hinders the flow of an electric current unit of resistance is ohm
Ohm Uses wet cell battery One ohm is the resistance of a standard volume of mercury under standard conditions
Material Conductors, semiconductors, insulators Dielectrics
Length Resistance is directly proportional to the length of the conductor
Cross sectional area Resistance is inversely proportional to the cross section
Temperature Resistance becomes greater as the temperature rises
Dry Cell Consists of a carbon rod surrounded by a manganese dioxide and immerse in a paste composed of ammonium chloride, zinc chloride and a small amount of water
Alkaline Type of dry cell has a useful life about ten times of an ordinary dry cell
Wet Cell It consists of hard rubber or plastic case containing sulfuric acid with two electrodes one lead and the other lead oxide
Flashlight Uses dry cell battery
Car battery Uses wet cell battery
Created by: lesterstoffels