Electricity Flashcards Chapter 11

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Author:
daynanairn
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177868
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Electricity Flashcards Chapter 11
Updated:
2012-10-30 16:14:58
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Electricity
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Chaptet 11
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  1. What is Current Electricity?
    The flow of electrons through a closed path
  2. What is a Electric Circuit?
    • A closed path along which electrons that are powered by an energy source can flow
  3. 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
  4. What is a Battery?
    • A connection of two or more cells
  5. What is an Electrode?
    One of two metal terminals in a cell or battery
  6. What is an Electrolyte?
    A solution or paste that conducts charges
  7. What is a Dry Cell?
    • A cell that contains an electrolyte that is a paste
  8. What is a Wet Cell?
    • A cell that contains liquid electrolyte
  9. What is a Primary Cell?
    A cell that can be used only once
  10. What is a Secondary Cell?
    A cell that can be recharged
  11. What is a Solar Cell?
    A cell that converts sunlight into electrical energy
  12. What is a Fuel Cell?
    A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
  13. What is a Solar Cell?
    A cell that converts sunlight into electrical energy
  14. What is a Terminal?
    A position on a cell that must be connected to other components to form a circuit
  15. What is a Switch?
    A control device that can complete or break the circuit to which it is connected
  16. What is an Open Circuit?
    A circuit that contains a gap or break
  17. What is an Electric Current?
    A measure of the charged particles that pass by a point in an electric each second
  18. What is a Coulomb (C)?
    The quantity of charge that is equal to the charge of 6.25 x 10 electrons
  19. What is an Ampere (A)?
    The unit of electric current, equivelent to one coulomb per second
  20. What is Electrical Resistance?
    The property of a substance that hinders electric current and converts electrical energy to other form of energy
  21. What is a Resistor?
    A device used in an electric circuit to decrease the current through a component by a specific amount
  22. What is a Load?
    A resistor or any other device that transforms electrical energy into heat, motion, sound, or light
  23. What is Potential Difference (Voltage)?
    The difference between the electric potential energy per unit of charge at two points in a circuit
  24. What is a Volt?
    The unit for potential difference; equivelent to one Joule (J) per Coulomb (C)
  25. What is a Circuit Diagram?
    A diagram that uses standard symbols to represent the components in an electric circuit and their connections

  26. 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:
  27. 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:
  28. What is Ohm's Law?
    The ratio of potential difference to current is a constant called resistance
  29. What is an Ohm ()?
    The unit for resistance, equivelent to one volt per ampere (V/A)
  30. What is a Superconductor?
    A material through which electrric electric charge can flow with no resistance
  31. What is Non-Ohmic?
    Not following Ohm's Law
  32. 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
  33. 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

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