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50 Cards in this Set
 Front
 Back
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 directcurrent 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


Ohmmeter ( )

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 quantitydependent 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
