electricity

Cards (16)

  • cell
    one battery
  • battery
    two or more cells together
  • power supply
    provides the electrical energy (e.g. cell)
  • a load
    when electrical energy is converted into other useful forms of energy (e.g. light bulb)
  • conducting paths

    allows electric charge to flow around the circuit (the wire)
  • 3 things that circuits need to have to work
    An energy source (battery or mains power), an energy receiver (like a light bulb) and an energy pathway (like a wire)
  • For a circuit to work:
    For a circuit to work, it must have the loads connected in a conducting path that connects to both sides of the power supply
  • Charge; symbol; unit

    A physical property whereby a particle can be either positive or negative. The symbol for charge is Q. The unit for charge is Coulomb (C).
  • Particle with no charge
    A particle with no charge is neutral
  • Current; symbol; unit; measured using.

    The rate of flow of charge. The symbol for current is I. The unit for current is Amperes (A). Measured using an ammeter.
  • Charge (Q), current (I), time (T)
    I = Q / T
    T = Q / I
    Q = I x T
  • Conventional current

    Electrons move and cause the current.
    Current: + (positive) --> - (negative)
  • Electron flow

    - (negative) --> + (positive)
  • Potential difference
    What pushes the charge to make them flow around the circuit.
  • What is a conductor (give 3 examples)

    A material that allows electricity to flow through it; 3 examples: copper, aluminium, gold
  • What is a insulator (give 3 examples)

    A material that does not allow electricity to flow through it easily; 3 examples: wood, glass, rubber, plastic.