Electricity Unit Flashcards

  1. Electricity
    a form of energy that results from the interaction of charged particles, such as electrons or protons
  2. Static Charge/Static Electricity
    an electric charge that tends to stay on the surface of an object, rather than flowing away quickly
  3. Charging by friction
    a process in which objects made from different materials rub against each other, producing a net static charge on each
  4. Electrostatic series
    A list of materials that have been arranged according to their ability to hold onto electrons
  5. Insulator
    a material in which the electrons cannot move easily from one atom to another
  6. Conductor
    a material in which electrons can move easily between atoms
  7. Semiconductor
    a material in which electrons can move fairly well between atoms
  8. Ground
    An object that can supply a very large number of electrons to, or can remove a very large number of electrons from, a charged object, thus neutralizing the object
  9. Electroscope
    a device for detecting the presence of an electric charge
  10. Charging by contact
    generating a charge on a neutral object by touching it with a charged object
  11. Laws of electric charges
    Laws that describe how two objects interact electrically when one or both are charged
  12. Electric Field
    A property of the space around a charged object, where the effect of its charge can be felt by other objects
  13. Induced Charge Separation
    The movement of electrons in a substance, caused by the electric field of a nearby charged object, without direct contact between the substance and the object
  14. Ion
    a charged atom or group of atoms
  15. Lightning rod
    A metal sphere or point, attached to the highest part of a building and connected to the ground
  16. Electrostatic precipitator
    A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas
  17. Van de Graaff Generator
    a device that accumulates very large charges
  18. Radiation Dosimeter
    A small device that detects and measures exposure to radiation
  19. Electric Circuit
    A closed path along which electrons that are powered by an energy source can flow
  20. Voltaic Cell
    A source of energy that generates an electric current by chemical reactions involving two different metals or middle compounds separated by a solution that is a conductor
  21. Battery
    A collection of 2 or more cells
  22. Electrode
    One of 2 metal terminals in a cell or battery
  23. Electrolyte
    A solution or paste that conducts charge
  24. Dry cell
    A cell that contains an electrolyte that is a paste
  25. Wet cell
    A cell that contains a liquid electrolyte
  26. Primary Cell
    A cell that can only be used once
  27. Secondary cell
    A cell that can be recharged
  28. Fuel cell
    A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
  29. Terminal
    location on a cell that must be connected to other components to form a circuit
  30. Switch
    a control device that can complete or break the circuit to which it is connected
  31. Open circuit
    a circuit that contains a gap or break
  32. Electric current
    The rate of movement of electric charge
  33. Coulomb (C)
    The quantity of charge that is equal to the charge of 6.25×10 to the power of 18 electrons
  34. Ampere (A)
    The unit of electric current, equivalent to one Coulomb per second
  35. Electrical Resistance
    The property of a substance that hinders electric current and converts electrical energy to other forms of energy
  36. Resistor
    A device used in an electric circuit to decrease the current through a component by a specific amount
  37. Load
    A resistor or any other device that transforms electrical energy into heat, motion, sound, or light
  38. Potential Difference (voltage)
    The difference between the electric potential energy per unit of charge at two points in a circuit
  39. Volt
    The unit for potential difference, equivalent to one joule per coulomb
  40. Circuit diagram
    A diagram that uses standard symbols to represent the components in an electric circuit and their connections
  41. Series circuit
    a circuit in which there is only one path along which electrons can flow
  42. Parallel Circuit
    A circuit in which there is more than one path along which electrons can flow
  43. Ohm's Law
    The ratio of potential difference to crew is a constant called resistance
  44. Ohm (Ω)
    The unit for resistance, equivalent to 1 V per ampere
  45. Superconductor
    A material through which electric charge can flow with no resistance
  46. Non-ohmic
    Not following Ohm's Law
  47. DC
    current in which charged particles travel through a circuit in only one direction
  48. AC
    current in which electrons move back and forth in a circuit
  49. Transformer
    an electrical device that changes the size of the potential difference of an alternating current
  50. Circuit Breaker
    A safety device that is placed in series with other circuits, which lead to appliances and outlets
  51. Fuse
    A safety device that is found in older buildings and some appliances; like a circuit breaker, it is placed in series with other circuits which lead to appliances and outlets
  52. Electrical Power
    The rate at which an appliance uses electrical energy
  53. Watt (W)
    A unit of electrical power
  54. Kilowatt (kW)
    A practical unit of electrical power (1kW=1000W
  55. Electrical energy
    The energy that is used by an appliance at a given setting determined by multiplying the power rating of an appliance by the length of time it is used
  56. Kilowatt-hour (kWh)
    The practical unit of electrical energy
  57. EnerGuide Label
    A label that gives details about how much energy an appliance uses in one year of normal use
  58. Smart Meter
    A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically
  59. Time of Use pricing
    A system of pricing in which the cost of each kWh of energy used is different at different times of the day
  60. Phantom Load
    The electricity that is consumed by an appliance or device when it is turned off
  61. Efficiency
    The ratio of useful energy output to total energy input, expressed as a percentage
  62. Base Load
    The continuous minimum demand for electrical power
  63. Hydroelectric power generation
    The generation of electrical power using a source of moving water
  64. Intermediate Load
    A demand for electricity that is greater than the baseload and is met by burning coal and natural gas
  65. Peak Load
    The greatest demand for electricity, which is met by using hydroelectric power and natural gas
  66. Renewable Energy Source
    A source of energy that can be replaced in a relatively short period of time
  67. Non-renewable energy source
    A source of energy that cannot be replaced as quickly as it is used
  68. Wind Farm
    Many large wind turbines at one location
  69. Solar energy
    Energy that is directly converted from the sun into electricity
  70. Photovoltaic effect
    The generation of a direct current when certain materials are exposed to light
  71. Biomass Energy
    Energy that is generated from plant and animal matter
Card Set
Electricity Unit Flashcards
Grade 9 Electricity Unit