1.Basic Concepts

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Transcript of 1.Basic Concepts

  • BASIC CONCEPTS

  • Electric Circuit

    An electric circuit is an interconnection of electrical elements.

  • Systems of UNITS

    Quantity Basic Unit SymbolLength meter m

    Mass kilogram kg

    Time second s

    Electric current ampere A

    Thermodynamic Temperature

    kelvin K

    Luminous intensity

    candela cd

  • The SI Prefixes

  • Charge and Current

  • Electric Current

  • Electric Current

    The charge transferred between time t0 and t

    o

    t

    tq idt

  • Voltage

  • Power

  • Energy

  • Passive Sign Convention

  • PSC: Example I

  • PSC: Example II

  • PSC: Example III

  • Circuit Elements

    Ideal Independent Source: provides a specified voltage or current that is completely independent of other circuit variables

    Ideal Independent Voltage Source:

  • Circuit Elements

    Ideal independent current source

  • Circuit Elements

    Ideal dependent voltage source

    Ideal dependent current source