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