Ohm's Law
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Lesson Title: Knowing Basic Electronics Components
Grade Level: High school (10th-12th grade)
Subject: Applied Design, Skills and Technology (ADST) Electronics, also applicable for Science and Physics
Duration: ~60 minutes
Required Equipment: Power Supply, Multimeter, Laptop with Wi-Fi access
Required Components: Breadboard, Resistors of varying values
Objectives:
Understand the fundamental relationship between voltage (V), current (I), and resistance (R) as expressed in Ohm’s Law V = I x R.
Demonstrate the application of Ohm’s Law in basic circuits.
Understand how to use a Breadboard for setting up circuits.
Familiarize with the use of multimeter and power supply for measurements.
Procedure:
Introduction (10 mins)
Introduce Ohm's Law and its significance in electronics.
Review the concept of voltage, current, and resistance.
Explain how these three parameters are interconnected.
Introduce students to a chosen simulation software/platform.
Demonstrate how to set up a circuit within the simulation to measure voltage across and current through a resistor.
Let students vary resistor values and observe changes, thereby visualizing Ohm’s Law in action.
Hands-on Activity: Building Circuits (20 mins)
Demonstrate how to set up a circuit on a breadboard, incorporating a resistor, voltmeter, and ammeter.
Students replicate this, measuring voltage and current for different resistor values.
Discuss and prove Ohm's Law using the real-life measurements.
Using Measurement Tools (10 mins)
Reinforce how to use the multimeter, specifically for measuring resistance, voltage, and current.
Emphasize safety precautions, especially when dealing with higher voltages.
Conclusion and Recap (5 mins)
Reiterate the importance of Ohm's Law in electronics and everyday devices.
Engage students in a short discussion about their observations, both in the simulation and the hands-on experiment.
Assessment:
Formative assessment: Students will participate in discussions, engage actively in both simulation and hands-on activities, and demonstrate a grasp of Ohm’s Law concepts.
Summative assessment: Post-lesson, students will undergo a written test that probes their understanding of Ohm's Law, the relationship between V, I, and R, and practical applications. They will also be evaluated on their ability to set up and interpret results from both simulation tools and real-life experiments.