definitions electricity

• current

  amount of charge passing per unit time

  (rate of charge flow)
• current formula

  units- Couloumb per second

  $\frac{\Delta Q}{\Delta t}$
• Voltage

  Energy transferred per unit charge
• Voltage formula

  $\frac{E}{Q}$

  units - Joule/Couloumb
• Votage derivation

  1 V = 1 kg m2 s-3 A -1
• current formula

  $\frac{Q}{t}$
• electronvolt: the amount of kinetic energy gained or lost by a single electron accelerating from rest through an electric potential difference of one volt in vacuum.
• potential difference

  voltage but across a component
• resistance

  a measure of the opposition to current flow in an electrical circuit
• resisitivity

  a property that describes the extent to which a material opposes the flow of electric current through it.
• ampere

  unit for current

  1 coulomb per second
• current

  charge per time
• load resistance

  total component resistance
• Conventional current flow


  Flow from + to -

  used to describe direction