Monday 27 August 2018

Term 3 Week 4 2018

Homework
  • Ex 6A, p.251-254 Level 2 D.C. Circuit Revision
  • Ex 6B, p.261-261 Internal Resistance of a Battery
  • Ex 6C, p.267-272 Kirchhoff's Laws

  • Electrical Charge

    Current
    Current is the rate of flow of Charge

    I = Δq/Δt

    Current

    Voltage
    Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

    Voltage
    Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

    V = ΔE/Q

    Ohm's Law & Resistance

    Power


    Circuit Symbols

    Ohm's Law



    Ohm's Law


    Internal Resistance of a Battery
    Batteries can be thought of as having an ideal voltage supply E.M.F. (Electromotive Force) in series with an internal resistance

    V = 𝛆 - Ir


    How to find the internal resistance of a
    battery


    Kichhoff's Laws
    Kirchhoff’s Current Law
    At any junction in a circuit, the total current entering the junction equals the total current leaving the junction
    Kirchhoff’s Voltage Law
    Around any closed path of a circuit, the total of all the potential differences, V, is zero

    Kirchhoff's Rules for Circuit Analysis - Explanation


    Kirchhoff's Rules for Circuit Analysis - Example 1

    Kirchhoff's Rules for Circuit Analysis - Example 2

    Kirchhoff's Rules for Circuit Analysis - Example 3


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