1 / 14

TEACHING THE QUANTITATIVE ANALYSIS OF CIRUITS ROBERT SHAW VERNY THURAIRAJAH

TEACHING THE QUANTITATIVE ANALYSIS OF CIRUITS ROBERT SHAW VERNY THURAIRAJAH. Introduction to Electricity and Electronic Circuits. Electricity is a general term encompassing a variety of phenomena resulting from the presence and flow of electric charge.

santos
Télécharger la présentation

TEACHING THE QUANTITATIVE ANALYSIS OF CIRUITS ROBERT SHAW VERNY THURAIRAJAH

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. TEACHING THE QUANTITATIVE ANALYSIS OF CIRUITSROBERT SHAWVERNY THURAIRAJAH

  2. Introduction to Electricity and Electronic Circuits Electricity is a general term encompassing a variety of phenomena resulting from the presence and flow of electric charge. If electricity is the flow of charge then electronics would be the applications of that flow. Electronics is the science and technology concerned with the understanding of electronic devices, circuits, and components. To perform Quantitative analysis of circuits one needs to understand electricity and electronics.

  3. Lesson Sequence • Lesson 1: Introduction to Electricity • Define electricity, electrical components, Ohm’s Law, breadboard • Lesson 2: Conversions and Resistance • Conversion units in Electronics, Digital Multi-meter, Resistor Colour Code chart, breadboard design and measurement. • Lesson 3: Parallel and Serial Circuits • Series and Parallel circuit equations, breadboard circuit planning, design, and layout, QUCs simulator. • Lesson 4: Kirchoff’s Voltage Law • Kirchoff’s Current Law and Kirchhoff's Voltage Law, QUCs Simulator. • Lesson 5: Summary Of Concepts • Review of lessons 1 to 4, Jigsaw Group exercise, Review Test format • Lesson 6: Electrical Circuits Test • Summative Assessment test

  4. Curriculum Expectations D2.1 use appropriate terminology related to electricity and magnetism, including, but not limited to: direct current, alternating current, electrical potential difference, resistance, power, energy, permanent magnet, electromagnet, magnetic field, motor principle, and electric motor. D2.2 construct real and simulated mixed direct current (DC) circuits (i.e., parallel, series, and mixed circuits), and analyse them in quantitative terms to test Kirchhoff’s laws.  D2.3 analyse, in quantitative terms, real or simulated DC circuits and circuit diagrams, using Ohm’s law and Kirchhoff’s laws.

  5. Ohms Law • Video demonstration of Ohms Law

  6. Resistor Colour Code Chart • Resitance conversions • Students use an inquiry-based approach to determine that resistance values of physical resistors and its units.

  7. Parallel and Serial Circuits Teaching Approach: Teacher reviews on smartboard interactively Series and Parallel circuit examples and equations. • Series Circuits • Resistance equation • Capacitance equation • Voltage equation • Parallel Circuits • Resistance equation • Capacitance equation • Voltage equation • Circuits Demonstration • Demonstrate voltage measurement with a DMM on example breadboard circuit. • Demonstrate voltage measurement with QUCS simulator. • Lab Work: • Lab to measure parallel and serial circuits on QUCS simulator.

  8. The QUCS SimulatorTeaching Approach: • QUCS Circuit Simulator • Students today are technology natives. They enjoy working with technology. • Teacher demonstrates to build a QUCS circuit, and how to run a simulation for measurement, analysis, resultant graphs and tables. • The simulator will be used for Parallel and Serial Circuits and Kirchoff Voltage laws.

  9. Kirchoff Voltage Laws Teaching Approach: Teacher reviews on smartboard interactively circuit examples and equations. • First Law – Conservation of Current • video on Kirchoff’s laws • Demonstrate current measurement with a DMM on example circuit. • Demonstrate current measurement with QUCS simulator. • Second Law – Conservation of Voltage at Nodes • Interactive demonstration on smartboard. • Demonstrate voltage measurement with a DMM on example circuit. • Demonstrate current measurement with QUCS simulator. • Lab Work: • Solve Kirchoff’s circuit problems on QUCS simulator.

  10. Potential Student Difficulties Abstract concepts of voltage, current, and power – may be hard for students to differentiate with clarity. Units of measurement are varied from Tera to nano. Conversions are needed frequently. Terminology is dense. Embracing many concepts Polarity, DC/AC, resistance and capacitance. Distinguishing between electron flow (negative to positive), and a a purely figurative positive unit of charge flow (positive to negative). Distinguishing between parallel and serial circuits. When a circuit loop has few components its easy to get confused. For complex circuits it can be challenging to find the nodes and the current loops. Both are needed to apply Kirchoff’s voltage laws. Breadboard work is not as simple and quick as simulator, and it requires dexterity, planning, and debug skills.

  11. Solutions to Student Difficulties Interactive videos and power points cover the abstract concepts, this will be online for reference and self paced learning. Conversion of units can be done with teams and groups on flipcharts and on the board in class summary and recaps. During jigsaw group activity system experts can collaboratively teach the denser concepts. Create diagrams of individual components to illustrate the physics and flow of electronics. Only use flow of positive charge on circuits. The seperation of component versus circuit helps students to grasp the different polarity flows. Have students work in groups with circuits in a pictionary style activity to differentiate between parallel and serial circuits, nodes and current loops. Students thrive on gaming. Demonstrate good breadboard planning, design, and wiring. The biggest problems are with unplanned disorganized circuits. Collect and diagnostically evaluate each groups performance.

  12. Safety Considerations A DC circuit lab concern is short circuits overheating. Checking voltages, and a sense of smell avoids this. Cutting of wire needs to be done pulling outwards from the body. Clean up to prevent tripping hazards.

  13. Practical Applications • The Flasher Circuit • A multi loop circuit, that varies flashing with resistance, used with Kirchoff’s laws. • Tesla Coil • A cool voltage device that creates lightning strikes, used in fundamentals of electricity. • Capacitor Charge Dissipation • discuss the rate of charge dissipation for electric plates.

  14. Students would have been assessed in the labs in a number of applied means: • Group work drawing parallel, serial circuits (Visual) • A set of labs building circuits using components and a breadboard (Kinesthetic) • A set of labs building circuits, adding tools, running simulations, generating graphs, data tables (Virtual, Analytical, Visual) • Video about the Ohms Law, and Kirchoff’s Law’s (Linguistic) • Group work conducting jigsaw expert training (Intrapersonal) • Lessons on terminology, laws, charts and conversions taught to the class (Interpersonal) • Demonstration of the DMM and measurements made on the bread boards. Demonstration of simulator tool. (Visual, Kinesthetic) • Exemplar of circuit planning, design, layout, and wiring techniques. (Visual) • Students’ understanding of the concepts evaluated on unit test, exercises, and lab questions (Logic) • Formative assessment based on lab work and unit test. (Summative/Formative) Differentiated Assessment

More Related