EEGR2111 L1

Circuits
  • Elements, connections, closed paths
    • Units
  • SI (International Sytem)
  • coulomb, ampere, volt, ohm, farad, henry,
  • watt, joule, second, hertz
  • milli, micro, mega
    • Current
  • Charge q (coulomb)
  • current i = dq/dt (ampere)
  • Slope <=> derivative
  • Current "through" elements
  • Polarity
    • Voltage
  • work(or energy) to move unit charge (J/C)
  • voltage "across" elements
  • Polarity
    • Power
  • Watts = Juoles/sec (rate of energy)
  • P = V I
  • Watts= (joule/coulomb)(coulomb/second)
  • Polarity (power delivered to/from element)
    • Power-Energy Relationship
  • p = dw/dt
  • p - power; w - energy (work)
  • so: energy is integral of power
    • Meters
  • Voltage - measured across
  • Current - break connection
    • Circuit design
  • Given - problem to solve
  • Identify limits/assumptions
  • Models (mathematical) for elements
  • Create circuit to solve problem
  • Prototype/redesign
    • Copyright information