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19 Cards in this Set
- Front
- Back
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unit of electric charge equal to the quantity of electricity transferred along the conductor by a current of one ampere in one second |
COLUMB (C) |
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unit equal to one joule per second or to the power represented by a current of one ampere flowing across a potential difference of one volt W=V x A |
WATT (W) |
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an amount of power especially the power required to operate an electrical device or appliance, expressed in watts |
WATTAGE |
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A unit of power equal to 1000 watts |
KILOWATT (kW) |
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A unit of energy transferred or expanded by one kilowatt in one hour a common unit of electric power consumption |
KILOWATT-HOUR (kWh) |
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The energy per unit charge available for conversion from a chemical, mechanical or other form of energy into electrical energy or vice versa in a conversion devise as a battery, generator or a motor |
ELECTROMOTIVE FORCE (emf) |
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The voltage difference between two points that represents the work involved in the transfer of a unit charge from one point to the other |
POTENTIAL DIFFERENCE |
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Potential difference or electromotive force expressed in volts: analogous to pressure in a water flow |
POTENTIAL |
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Unit of potential difference and electromorive |
VOLT (V) |
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The rate of flow of electric charge in a circuit per unit time measured in amperes |
CURRENT |
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Unit of electric current |
AMPERE (A) |
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The strength of an electric current measured or express in amperes: analogous to the rate of water flow |
AMPERAGE |
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The opposition of a conductor to the flow of current, causing some of the electric energy to be transformed into heat and usually measured in ohms |
RESISTANCE (R) |
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Unit of electrical resistance |
OHM |
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That law that for any circuit the electrical current is directly proportional to the voltage and inversely proportional to the resistance I=V/R |
OHM'S LAW |
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The principle that the rate of production of heat by direct current is directly proportion to the resistance of the circuit and to the square of current |
JOULE'S LAW |
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The resistance per unit length of a substance with a cross sectional area. Also called specific resistance |
RESISTIVITY |
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A measure of the ability of a substance to conduct electric current, equal to the reciprocal of the resistivity of the substance. Also called specific conductance |
CONDUCTIVITY |
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The complete path of an electric current including the source of electric energy conductance |
CIRCUIT |
