# Watt's Law

**Lesson Plan: **Watt's Law

**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, Light Bulbs (3W) x 2,

**10 ฮฉ / 3W Resistor**

**Procedure**:

*Introduction (10 mins)*

Introduce the concept of power in electronics.

Discuss Wattโs Law and its mathematical representation:

**P= V x I**.Highlight the practical implications of power consumption in devices.

Navigate students through a chosen simulation software/platform.

Virtually set up a basic circuit, observing and noting the behavior of voltage and current.

Use the software's features to calculate power consumption using Watt's Law.

*Hands-on Activity: Measuring Power (20 mins)*

Demonstrate the setup of a basic circuit on a breadboard.

Guide students to measure voltage and current using the multimeter.

Calculate the power consumed by the circuit using Wattโs Law.

Discuss factors affecting power consumption and ways to optimize it.

*Interactive Discussion (10 mins)*

Present various real-world scenarios and electronic components.

Engage students in calculating power requirements using Wattโs Law.

Discuss the significance of power ratings in devices and components.

*Conclusion and Recap (5 mins)*

Review the fundamental principles of Watt's Law and its importance in electronics.

Encourage students to consider power consumption in their daily life and understand its broader environmental implications.

**Assessment**:

**Formative assessment**: During the lesson, gauge students' understanding through their engagement in discussions, accuracy in calculations, and proficiency in setting up and measuring circuits.**Summative assessment**: At the end of the lesson, students will undergo a written test encompassing theoretical questions on Watt's Law, practical calculations, and scenarios where they need to predict power consumption. Their practical skills might also be tested by presenting them with a circuit and asking them to measure and calculate its power consumption accurately.

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