WATCH THE VIDEO OF THE COMPLETE ACTIVITY
⚠️ This Physics experimental lesson manual was designed to guide students through the assembly and investigation of electrical circuits, allowing them to connect electricity concepts to a hands-on learning experience.
The material provides an illustrated step-by-step guide for assembling a mixed circuit with four light bulbs, including component identification, wire measurement, connection organization, circuit observation, and electric current calculations.
11 investigative questions, distributed throughout a 10-page experimental manual, including safety guidelines, a materials list, illustrations, and experimental procedures.
The sequence begins by identifying the electrical characteristics of the light bulbs, follows the assembly process, and concludes with an analysis of circuit behavior and the calculation of nominal electric current.
Especially suitable for High School students studying electricity and electrical circuits in Physics classes.
The material can also be used in practical activities, scientific investigation projects, and laboratory lessons, depending on students' prior knowledge.
It can support teachers who want to develop a structured experimental lesson that integrates theory, assembly, observation, and calculations.
Ready-to-print PDF containing:
🔹 10-page experimental lesson manual;
🔹 11 questions involving investigation, observation, and calculations;
🔹 safety guidelines for conducting the activity;
🔹 lesson objectives and a list of required materials;
🔹 illustrated diagram of a mixed circuit with four light bulbs;
🔹 instructions for organizing and securing components on the workbench;
🔹 guidelines for measuring and preparing electrical wires;
🔹 identification of lamp holders, switches, and electrical terminals;
🔹 explanations of electrical connections and circuit nodes;
🔹 comparison between series and parallel connections;
🔹 spaces for recording experimental observations;
🔹 formula for calculating the nominal electric current of a light bulb.
Important: This product includes the instructional manual in PDF format only. Electrical components, the workbench, and the instruments required to perform the experiment are not included.
Electrical circuits: Identifying components and understanding their functions.
Series circuits: Recognizing a single path for electric current.
Parallel circuits: Understanding the existence of multiple paths for electric current.
Mixed circuits: Investigating a circuit that combines series and parallel connections.
Switches: Understanding how opening and closing a circuit affects its operation.
Conductors and insulators: Recognizing the function of electrical wires and their insulating coverings.
Electrical nodes: Identifying connection points between conductors.
Electrical quantities: Voltage, current, resistance, and power.
Nominal electric current: Applying the relationship between electrical power and voltage.
Experimental investigation: Observing light bulb brightness and analyzing the effects of interrupting a circuit branch.
The manual organizes the lesson into stages, allowing students to follow the process of constructing and investigating an electrical circuit.
Stage 1 – Identifying the materials
Students examine the rated electrical characteristics of the light bulbs, recognize the function of the switch, and analyze what happens when the circuit is opened.
Stage 2 – Organizing the workbench
The guide presents the arrangement of the four lamp holders, the switch, and the wires, using illustrations to help students identify and organize the components.
Stage 3 – Measuring and preparing the wires
Students practice measuring lengths, calculate the extra wire length needed for connections, and recognize the importance of insulating coverings and properly securing conductors.
Stage 4 – Identifying circuit connections
Using diagrams, students investigate the characteristics of series and parallel connections, analyzing how the light bulbs behave when one of the current paths is interrupted.
Stage 5 – Testing and investigation
After the teacher completes the safety inspection and energizes the circuit, students observe how the light bulbs operate, compare their brightness, and record their conclusions.
Stage 6 – Calculating electric current
The activity concludes with students identifying the rated power and voltage values and applying the formula I = P/U to calculate the nominal current of a light bulb.
⚠️ This activity must be conducted exclusively using an isolated educational power supply operating at extra-low voltage, with current limiting and compatible light bulbs.
The manual specifies that all assembly work and modifications must be performed with the power supply turned off. All connections must be inspected by the teacher, and only the teacher may authorize and perform the energization after inspecting the circuit.
The assembled circuit must never be connected directly to a 127 V or 220 V household electrical supply.
✅ Structured experimental lesson: A step-by-step guide covering circuit preparation, assembly, and investigation.
✅ Step-by-step illustrations: Visual representations of components, connections, and workbench organization.
✅ Integration of theory and practice: Series, parallel, and mixed circuit concepts applied through experimentation.
✅ Guided investigation: Questions distributed throughout the different stages of the lesson.
✅ Mathematics applied to Physics: Length measurements and electric current calculations.
✅ Safety guidelines: Essential precautions presented before circuit assembly.
Brasil
Estados Unidos
