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### 50 Cards in this Set

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 Ampere (A) the fundamental SI unit of electric current; equal to once coulomb per second Battery a combination of two or more electrochemical cells; also, a direct-current voltage source which converts chemical, thermal, nuclear or solar energy into electrical energy Cell a device that converts chemical energy to electrical energy Conductivity a property of material that describes the availability of charges that are free to move under the influence of an electrical field Conductor a material, usually a metal, in which electric charge moves easily Coulomb (C) the derived SI unit of electric charge equal to one ampere per second passing through a given area Current in an electrical circuit, the rate at which charge passes a given point Electric Field the region around a charged particle through which a force is exerted on another charged particle Electric Field Line the imaginary line along which a positive test charge would move in an electric field Electric Field Strength the force per unit charge on a stationary positive test charge in an electric field; a vector quantity Electrical Energy the total amount of energy in an electric circuit; equal to the product of power consumed and the time of the charge flow; a scalar quantity Electrical Power the rate at which electrical energy is converted into other forms; a scalar quantity Electromagnetic Induction the process of generating a potential difference in a conductor due to the relative motion between the conductor and a magnetic field Electromagnetic Wave periodically changing electric and magnetic fields that move through a vacuum at speed c = 3.00 X 10(^8)m/s Electrostatic Force the force that acts on two point charges; magnitude of force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them; a vector quantity Elementary Charge denoted by e, the charge equal in magnitude to the charge of an electron (-e) or the charge of a proton (+e) Equivalent Resistance the single resistance that could replace several resistors in a circuit Induced Potential Difference the difference in potential created in a conductor due to its relative motion in a magnetic field Joule (J) a derived SI unit equal to the work done when a force of one newton produces a displacement of one meter; the unit for electrical energy Law of Conservation of Charge states that in a closed, isolated system, the total charge of the system remains constant Magnet a material in which the spinning electrons of its atoms are aligned with one another Magnetic Field the region where magnetic force exists around a magnet or any moving charged object Magnetic Field (Flux) Line the imaginary lines that map out the magnetic field around a magnet Magnetic Field Strength the number of magnetic field lines per unit area passing through a plane perpendicular to the direction of the lines; a vector quantity Magnetic Force the force produced by the motion of charges relative to each other; a vector quantity Magnetism the force of attraction or repulsion between magnetic poles Neutron subatomic particle with no charge and a mass approximately equal to that of a proton North Magnetic Pole the magnetic pole from which the magnetic flux of a magnet is considered to emerge Ohm ( ) the derived SI unit of electrical resistance equivalent to one volt per ampere Ohm-meter ( ) the SI unit for resistivity Ohm's Law states that at constant temperature the resistance of a conductor is equal to the ratio of the potential difference applied across it to the current that flows through it Parallel Circuit an electrical circuit in which the circuit elements are connected between two points, with one end of each component connected to each piece Potential Difference the difference in potential energy per unit charge between two points in an electric field; a scalar quantity Proton the fundamental positively charged (+) subatomic particle of matter; particle charge is equal in magnitude to that of an electron Resistance a measure of the opposition that a device or conductor offers to the flow of electric current Resistor a device designed to have a definite amount of resistance Series Circuit an electrical circuit in which all parts are connected end to end to provide a single path for current Switch a device for making, breaking, or changing the connections in an electric circuit Tesla (T) the derived SI unit of magnetic flux density or magnetic field strength; equal to one weber per square meter Variable Resistor a coil of resistance wire whose effective resistance can be varied by sliding a contact point Volt (V) the derived SI unit of electric potential difference; equal to one joule per coulomb Voltmeter a device for measuring potential difference across an element when connected in PARALLEL with it in an electric circuit Watt (W) the derived SI unit of power equal to one joule per second Weber (Wb) the derived SI unit for measuring magnetic flux Coulomb's Law states that the magnitude of force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them Electronvolt (eV) a unit of energy equal to the work done in moving an elementary charge through a potential difference of one volt Resistivity a quantity-dependent property of a material, independent of the material's physical shape, that is closely related to resistance Electric Circuit a closed path along which charged particles move Electron the fundamental negatively charged (-) subatomic particle of matter; particle charge is equal in magnitude to that of a proton; mass is negligible compared to a proton Ammeter a device for measuring electrical current when connected in SERIES in an electrical circuit