Electricity- Chapter 11

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Electricity- Chapter 11
2014-04-04 15:05:00

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  1. Electric circuit
    a closed path along which electrons that are powered by an energy source can flow
  2. Voltaic cell
    A source of energy that generates an electric currently chemical reactions in gloving two different metals or metal compounds separated by a conducting solution
  3. Battery
    A connection of two or more cells
  4. Electrode
    One or two metal terminals in a cell or battery
  5. Electrolyte
    A solution or paste that conducts charge
  6. Dry cell
    A cell that contains an electrolyte made of a paste
  7. Wet cell
    A cell that contains a liquid electrolyte
  8. Primary cell
    A cell that can be used only once
  9. Secondary cell
    A cell that can be recharged
  10. Fuel cell
    A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
  11. Solar cell
    A cell that converts sunlight in to electrical energy
  12. Terminal
    A position on a cell that must be connected to other components to form a circuit
  13. Switch
    A control device that can complete or break the circuit to which it is connected
  14. Open circuit
    A circuit that contains a gap or break
  15. Electric current
    A measure of the number of charged particles that pass by a point in an electric circuit each second
  16. Coulomb
    The quantity of charge that is equal to the charge of 6.25 x 10 to the exponent 18 electrons
  17. Ampere
    The unit of electric current equivalent to one coulomb per second
  18. Electrical resistance
    The property of the substance that hinders electric current and converts electrical energy to other forms of energy
  19. Resistor
    a device used in an electrical circuit to decrease the current through a component by a specific amount
  20. Load
    A resistor or any other device that transforms electrical energy into heat, motion, sound, or light
  21. Potential difference (voltage)
    The difference between the electrical potential energy per unit of charge at two point in a circuit
  22. Volt
    The unit for potential difference, equivalent to one joule per coulomb
  23. Circuit diagram
    A diagram that uses standard symbols to represent the components in an electrical circuit and their connections
  24. Series circuit
    A circuit in which there is one path along which electrons can flow
  25. Parallel circuit
    A circuit in which there is more than one path a long which electrons can flow
  26. Ohms law
    • The ratio of potential difference to current is a constant called resistance
    • V=IR
  27. Ohm
    The unit for resistance equivalent to one volt per ampere
  28. Superconductor
    A material through which electric charge can flow with no resistance
  29. Non ohmic
    Not followings ohms law
  30. Loads in series
    Adding loads to a series is like increasing the wire
  31. loads in parallel
    The sum if the currents equals the the current throught he hole wire