DC Circuits Week 2

Topics 1, 2, 3, 8 scheduled for Lesson 2 (from assessment guidelines, subject to change)

T5 Effects of electrical current encompassing:  (Pink was in lesson 1)

  • physiological effects of current and the fundamental principles (listed in AS/NZS 3000) for protection against the this effect
  • basic principles by which electric current can result in the production of heat; the production of magnetic fields; a chemical reaction
  • typical uses of the effects of current
  • mechanisms by which metals corrode
  • fundamental principles (listed in AS/NZS3000) for protection against the damaging effects of current

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New and continuing material

T1 Basic electrical concepts encompassing:   (red was in lesson 1 homework videos)

  • electrotechnology industry
  • static and current electricity 
  • production of electricity by renewable and non renewable energy sources
  • transportation of electricity from the source to the load via the transmission and distribution systems
  • utilisation of electricity by the various loads
  • basic calculations involving quantity of electricity, velocity and speed with relationship to the generation and transportation of electricity.

T2 Basic electrical circuit encompassing:  (pink was in lesson 1)

  • symbols used to represent an electrical energy source, a load, a switch and a circuit protection device in a circuit diagram
  • purpose of each component in the circuit
  • effects of an open-circuit, a closed-circuit and a short-circuit
  • multiple and sub-multiple units

T3 Ohm’s Law encompassing:  (pink was in lesson 1)

  • basic d.c. single path circuit.
  • voltage and currents levels in a basic d.c. single path circuit.
  • effects of an open-circuit, a closed-circuit and a short-circuit on a basic d.c. single path relationship between voltage and current from measured values in a simple circuit
  • determining voltage, current and resistance in a circuit given any two of these quantities
  • graphical relationships of voltage, current and resistance
  • relationship between voltage, current and resistance

T8 Series circuits encompassing:

  • circuit diagram of a single-source d.c. ‘series’ circuit.
  • Identification of the major components of a ‘series’ circuit: power supply; loads; connecting leads and switch
  • applications where ‘series’ circuits are used in the Electro technology industry.
  • characteristics of a ‘series’ circuit – connection of loads, current path, voltage drops, power dissipation and affects of an open circuit in a ‘series’ circuit.
  • the voltage, current, resistances or power dissipated from measured or given values of any two of these quantities
  • relationship between voltage drops and resistance in a simple voltage divider network.
  • setting up and connecting a single-source series dc circuit Simulation only in week 1
  • measurement of resistance, voltage and current values in a single source series circuit
  • effect of an open-circuit on a series connected circuit

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DC week 2 2 res meter

This circuit and these measurements (physically done as opposed to theory) and any theory associated with this circuit to determine voltages and currents is essential to you study and this preliminary circuit is one to keep coming back to so that you can focus on what is required by week 3 of your course.

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Lesson two DC circuits plan for teaching text

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Ohms law worksheets and lab  PDF

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Ohms Law powerpoint exp from key

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Scientific notation to standard form 7 mins

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Mac IconScientific notation with TI calculator

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(private link) W2 dbox

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Professor Dave scientific notation

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Effects of an electric current PDF handout worksheet  PDF


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Powerpoint from keynote conversion effects of electric current

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Video for the first lab, 11 minutes

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Here is past board work from Week 2 of DC

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