G482 Electricity

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  • G482 Electricity
    • Current
      • Change in Charge= Current x change in time.
        • Q=I x t
          • Coulomb is unit of charge and is amount of charge that passes in 1 second when the current is 1 ampere.
      • Current is the rate of flow of charge.
    • Drift velocity
      • Average velocity of electrons
      • I = nAvq
      • Current depends on drift velocity
        • Current
          • Change in Charge= Current x change in time.
            • Q=I x t
              • Coulomb is unit of charge and is amount of charge that passes in 1 second when the current is 1 ampere.
          • Current is the rate of flow of charge.
    • P.d. or Voltage
      • The energy converted per unit charge moved.
        • The energy per unit of charge.
          • P.d. or Voltage
            • The energy converted per unit charge moved.
              • The energy per unit of charge.
              • V= W/Q
              • The p.d across a component of 1 volt when you convert 1 joule of energy moving 1 coulomb of charge.
        • V= W/Q
        • The p.d across a component of 1 volt when you convert 1 joule of energy moving 1 coulomb of charge.
      • Resistance
        • R=V/I and is measured in ohms.
        • 3 things determine resistance- Length, Area and Resistivity
        • Resisitivity: p=RA/L and R=p x 1/A
        • In ohmic conductors, R is constant as long as temperature is constant.

    Comments

    Inker

    This is suuper helpful, thanks

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