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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
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
a device that converts chemical energy to electrical energy
a property of material that describes the availability of charges that are free to move under the influence of an electrical field
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
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
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
the force of attraction or repulsion between magnetic poles
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
the fundamental positively charged (+) subatomic particle of matter; particle charge is equal in magnitude to that of an electron
a measure of the opposition that a device or conductor offers to the flow of electric current
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
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
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
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
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
a device for measuring electrical current when connected in SERIES in an electrical circuit