SNC1DW Chapter 11

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Author:
Jaimin_Jethva
ID:
269521
Filename:
SNC1DW Chapter 11
Updated:
2014-04-06 21:26:09
Tags:
science electricity
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Description:
Glossary terms and definitions for chapter 11.
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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 on electric current by chemical reactions involving two different metal or metal compounds separated by a solution that is a conductor.

  3. Battery
    A connection of two or more cells.

  4. Electrode
    One of 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 that is a paste.

  7. Wet cell
    • A cell that contains a liquid electrolyte.
  8. Primary cell
    A cell that can only be used 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 into electrical energy.

  12. Terminal
    Location 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
    The rate of movement of electric charge.

  16. Coulomb (C)
    The quantity of charge that is equal to the charge of 6.25 x 10^18 electrons.

  17. Ampere (A)
    The unit of electric current, equal to one coulomb per second. An ammeter is used to measure this value.

  18. Electrical resistance
    The property of a substance that hinders electric current and converts electrical energy to other forms of energy. Resistors are used to decrease electric current through a component by a specific amount.

  19. Resistor
    A device used in an electric 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.

    A light bulb is a load that turns electrical energy into light.

  21. Potential Difference (voltage)
    The difference between the electrical energy per unit of charge at two points in a circuit.

  22. Volt (V)
    The unit of potential difference, equivalent to one joule (J) per coulomb (C).

    i.e. Most cells are listed as having 1.5V of potential difference (even C and D size batteries).
  23. Circuit Diagram
    A diagram that uses standard symbols to represent the components in an electric circuit and their symbols.

  24. Series Circuit
    A circuit in which there is only one path along which electrons can flow.

  25. Parallel Circuit
    A circuit in which there is more than one path along which electrons can flow.

  26. Ohm's Law
    The ratio of potential difference to current is a constant called resistance.

  27. Ohm
    The unit of electrical resistance, equivalent to one volt per ampere (V/A).

  28. Superconductor
    A material through which electric charge can flow with no resistance.

  29. Non-Ohmic
    Not following Ohm's Law.

  30. Loads in Series
    • - Current is the same throughout the circuit
    • - Potential difference is split evenly through every load and equals the potential difference between the terminals of the cell
    • - Resistance increases as more loads are added to a series circuit

  31. Loads in Parallel
    • - Potential difference is the same throughout the circuit
    • - The current entering loads that are connected in parallel is equal to the sum of the currents entering all loads
    • - The resistance of loads that are connected in parallel is less than the resistance of the smallest road

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