Electricity cards for exam

  1. What is Electricity?
    • A form of energy that results from the interaction of charged particles
    • i.e.- Protons, Electrons
  2. What is Static Charge (Static Electricity)?
    Electric charge that remains "static" or doesn't move
  3. What is Charged by Friction?
    • Involves the transfer of electric charge by rubbing or friction
    • i.e.- Combing Hair
  4. What is the Electrostatic Series?
    • Used to determine the kind of electric charge produced on each substance when two substances are rubbed together
    • Image Upload 1
    • (Another good diagram is also available on page 405 in the textbook for studying)
  5. What is an Insulator?
    • A material in which electrons cannot move easily from one atom to another atom
    • i.e.- Vinyl, Silicon, Teflon.
  6. What is a Conductor?
    • A material in which electrons can move easily atoms
    • i.e.- air, glass, human body
  7. What is a Semiconductor?
    • A material in which electrons can move fairly well between atoms
    • i.e. lead, cotton, wool
  8. What is Ground?
    An object that can supply a very large number of electrons to, or remove a large number of electrons from, a charged object, thus neutralizing the object
  9. What is an Electroscope?
    • A device for detecting the presence of and electric charge
    • Types- pith ball electroscope, metal leaf electroscope
  10. What is Charging by Contact?
    Generating a charge on a neutral object by touching it with a charged object
  11. What is the Law of Electric Charges?
    Laws that describe how two objects interact electrically
  12. What is an Electric Field?
    A property of the space around a charged object, where the effect of it's charge can be felt on other objects
  13. What is Induced Charge Seperation?
    The movement of electrons in a substance, caused by the electric field of a nearby charged object between the substance and the object
  14. What is an Ion?
    A charged atom or group of atoms
  15. What is a Lightning Rod?
    • A metal shpere or point, attached to the hightest part of a building and connected to the ground
    • Image Upload 2
  16. What is a Electroscostatic Precipitator?
    A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas
  17. What is a Van de Graff Generator?
    A device that accumulates very large charges
  18. What is a Radiation Dosimeter?
    A small device that detects and measures exposure to radiation
  19. What is Current Electricity?
    The flow of electrons through a closed path
  20. What is a Electric Circuit?
    • A closed path along which electrons that are powered by an energy source can flow
    • Image Upload 3
  21. What is a Voltaic Cell?
    A source of energy that generates an electric current by chemical reactions involving two different metals or metal compounds separated by a solution or conductor
  22. What is a Battery?
    • A connection of two or more cells
    • Image Upload 4
  23. What is an Electrode?
    One of two metal terminals in a cell or battery
  24. What is an Electrolyte?
    A solution or paste that conducts charges
  25. What is a Dry Cell?
    • A cell that contains an electrolyte that is a paste
    • Image Upload 5
  26. What is a Wet Cell?
    • A cell that contains liquid electrolyte
    • Image Upload 6
  27. What is a Primary Cell?
    A cell that can be used only once
  28. What is a Secondary Cell?
    A cell that can be recharged
  29. What is a Solar Cell?
    A cell that converts sunlight into electrical energy
  30. What is a Fuel Cell?
    A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
  31. What is a Solar Cell?
    A cell that converts sunlight into electrical energy
  32. What is a Terminal?
    A position on a cell that must be connected to other components to form a circuit
  33. What is a Switch?
    A control device that can complete or break the circuit to which it is connected
  34. What is an Open Circuit?
    A circuit that contains a gap or break
  35. What is an Electric Current?
    A measure of the charged particles that pass by a point in an electric each second
  36. What is a Coulomb (C)?
    The quantity of charge that is equal to the charge of 6.25 x 10Image Upload 7 electrons
  37. What is an Ampere (A)?
    The unit of electric current, equivelent to one coulomb per second
  38. What is Electrical Resistance?
    The property of a substance that hinders electric current and converts electrical energy to other form of energy
  39. What is a Resistor?
    A device used in an electric circuit to decrease the current through a component by a specific amount
  40. What is a Load?
    A resistor or any other device that transforms electrical energy into heat, motion, sound, or light
  41. What is Potential Difference (Voltage)?
    The difference between the electric potential energy per unit of charge at two points in a circuit
  42. What is a Volt?
    The unit for potential difference; equivelent to one Joule (J) per Coulomb (C)
  43. What is a Circuit Diagram?
    A diagram that uses standard symbols to represent the components in an electric circuit and their connections

    Image Upload 8
  44. What is a Series Circuit?
    • A circuit in which there is only one path along which electrons can flow
    • Series and Parallel circuits are compared below:
    • Image Upload 9
  45. What is a Parallel Circuit?
    • A circuit in which there is more than one path in which electrons can flow
    • Series and Parallel circuits are compared below:
    • Image Upload 10
  46. What is Ohm's Law?
    The ratio of potential difference to current is a constant called resistance
  47. What is an Ohm (Image Upload 11)?
    The unit for resistance, equivelent to one volt per ampere (V/A)
  48. What is a Superconductor?
    A material through which electrric electric charge can flow with no resistance
  49. What is Non-Ohmic?
    Not following Ohm's Law
  50. What is Loads in Series?
    • Loads that are all connected to the same wires
    • V= V1 + V2 + V3
    • IT = I1 = I2 = I3
    • RT = R1 + R2 + R3
  51. What is Loads in Parallel?
    • Loads that are not all connected to the same wires
    • VT = V1 = V2 = V3
    • IT = I1 + I2 + I3
    • RT < R1 ; RT < R2 ; RT <R3
  52. Direct Current (DC)
    Current in which charged particles travel through a circuit in only one direction
  53. Alternating current (AC)
    A current in which electrons move back and forth in a circuit
  54. Transformer
    An electrical device that changes the size of the potential difference of an alternating current
  55. Circuit breaker
    A safety device that is placed in series with other circuits that lead to appliances and outlets
  56. 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 that lead to appliances and outlets
  57. Electrical power
    The rate at which an appliance uses electrical energy
  58. Watt (W)
    A unit of electrical power; 1 kilowatt = 1000 W
  59. Kilowatt (kW)
    A practical unit of electrical power; 1 kW = 1000 W
  60. Electrical energy
    • The energy that is used by an appliance at a given setting; is determined by multiplying its power rating by the length of time it is used
    • Image Upload 12
  61. Kilowatt-hour (kW-h)
    The practical unit of electrical energy
  62. EnerGuide label
    • A label that gives details about how much energy an appliance uses in one year of normal use
    • Image Upload 13
  63. Smart meter
    A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically
  64. Time of use pricing
    A system of pricing in which the cost of each kW-h of energy used is different times of the day
  65. Phantom load
    • The electricity that is consumed by an appliance or device when it is turned off
    • i.e.- Clock of a DVD player
  66. Efficiency
    The ratio of useful energy output to total energy input, expressed as a percentage
  67. Base load
    The continuous minimum demand for electrical power
  68. Hydroelectric power generation
    The production of electricity using a source of moving water
  69. Intermediate load
    A demand for electricity that is greater than the base load and is met by burning coal and natural gas
  70. Renewable energy source
    • A source of energy that can be replaced in a relatively brief period of time
    • i.e.- Solar Energy
  71. Non-renewable energy source
    • A source of energy that cannot be replaced as quickly as it is used
    • i.e.- Coal Burning
  72. Solar energy
    Energy that is directly converted from the energy of the Sun into electricity
  73. Photovoltaic effect
    The generation of a direct current when certain materials are exposed to light
  74. Biomass energy
    Energy that is generated from plant and animal matter
Card Set
Electricity cards for exam
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