Objectives (5 - 7 minutes)

1. Understand the concept of the magnetic field generated by a current coil. Students should be able to identify and describe the characteristics of the magnetic field generated by a coil, including its direction and intensity.

2. Apply the right-hand rule to determine the direction of the magnetic field of a coil. Students should be able to demonstrate the use of the right-hand rule in practical situations, such as determining the magnetic field at the center of a flat coil.

3. Calculate the value of the magnetic field at the center of a flat coil using Ampère's formula. Students should be able to solve problems involving the calculation of the magnetic field at the center of a coil using Ampère's formula.

   Secondary Objectives:

   • Develop critical thinking skills and problem-solving through the application of theoretical concepts in practical situations.

   • Encourage active participation of students during the class, promoting discussion and exchange of ideas.

Introduction (10 - 15 minutes)

1. Review of Previous Content: The teacher starts the class by reviewing the concepts of electric current, magnetic field, and coil. They can use practical examples and everyday situations to reinforce the importance of these concepts and how they are interconnected. (3 - 4 minutes)

2. Problem Situation 1: The teacher proposes the following situation: "Imagine you are designing an electric motor. How would you ensure that the magnetic field generated by the motor's coils is in the correct direction and with the necessary intensity for the motor to function?" The teacher encourages students to think about the importance of the magnetic field and how it can be controlled. (3 - 4 minutes)

3. Contextualization: The teacher highlights the importance of the magnetic field generated by a current coil in various everyday applications, such as electric motors, transformers, computer hard drives, among others. They can use images and videos to illustrate these examples and make the class more interesting. (2 - 3 minutes)

4. Topic Introduction: The teacher introduces the concept of the magnetic field generated by a current coil, explaining that the electric current flowing through a coil creates a magnetic field inside it. They can use a coil of copper wire and a compass to demonstrate the practical effect of this phenomenon. (2 - 3 minutes)

5. Problem Situation 2: The teacher proposes the following situation: "Imagine you have a coil of copper wire and a compass. How could you use the compass to determine the direction and intensity of the magnetic field generated by the coil?" The teacher encourages students to think about possible experiments and apply the right-hand rule. (2 - 3 minutes)

Development (20 - 25 minutes)

1. Practical Activity 1 - Building a Current Coil (10 - 12 minutes): The teacher divides the class into small groups and provides each group with a piece of copper wire, a battery, a compass, and a piece of paper. They instruct the students to wrap the copper wire around the paper, forming a coil, and connect the ends of the copper wire to the battery. Then, the students should place the compass near the coil and observe the needle's deflection. The teacher guides the students to repeat the experiment, varying the number of turns of the copper wire in the coil and the intensity of the electric current. During the activity, the teacher should move around the room, clarifying doubts and guiding the students. In the end, the students should record the results of their experiments and discuss the observations.

2. Practical Activity 2 - Applying the Right-Hand Rule (5 - 7 minutes): The teacher continues the previous practical activity, asking students to apply the right-hand rule based on the results obtained to determine the direction of the magnetic field generated by the coil. The teacher should reinforce the importance of holding the coil in a way that the electric current flows in the direction of the fingers of the right hand, and that the direction of the thumb of the right hand points to the direction of the magnetic field. Students should record their observations and discuss the results.

3. Practical Activity 3 - Calculating the Magnetic Field (5 - 6 minutes): The teacher challenges the students to calculate the value of the magnetic field at the center of a flat coil using Ampère's formula. The teacher provides the formula and the measurements of the coil (radius and number of turns of the copper wire), and the students must solve the problem in their groups. The teacher should move around the room, assisting the students and clarifying doubts. In the end, the students should present their solutions, and the teacher should correct errors and reinforce correct answers.

4. Group Discussion (3 - 5 minutes): To conclude the Development stage, the teacher promotes a group discussion, where each group presents their conclusions and solutions to the practical activities. The teacher should encourage students to explain their reasoning and exchange ideas with each other. They can ask questions that promote students' reflection on the concepts studied and their application in practical situations.

Return (10 - 12 minutes)

1. Group Discussion (3 - 4 minutes): The teacher invites representatives from each group to share the solutions and conclusions they reached during the practical activities. Students should explain what they understood about the right-hand rule, the magnetic field generated by a coil, and how they calculated the intensity of this field. During this discussion, the teacher should ask questions to verify students' understanding and clarify possible doubts.

2. Connection with Theory (2 - 3 minutes): The teacher then makes a connection between the practical activities and the theory presented at the beginning of the class. They reinforce the importance of the magnetic field generated by a current coil in various everyday applications, and how the right-hand rule and Ampère's formula are used to determine the direction and intensity of this field. The teacher can use the notes made by students during the practical activities to illustrate this connection.

3. Reflection (3 - 4 minutes): The teacher proposes that students reflect for a minute on the answers to the following questions:

   • What was the most important concept learned today?
   • What questions have not been answered yet?

   Then, the teacher asks some students to share their reflections. They should emphasize the importance of reflecting on what was learned, identifying doubts, and seeking answers to them.

4. Feedback and Closure (1 - 2 minutes): The teacher concludes the class by asking students to provide feedback on the lesson, what they found most interesting, what could be improved, etc. They thank everyone for their participation and reinforce the importance of continuous study and effort to understand Physics concepts. The teacher may also give a preview of what will be studied in the next class.

Conclusion (5 - 7 minutes)

1. Summary of Contents (1 - 2 minutes): The teacher starts the Conclusion of the class by giving a brief summary of the main points covered. They reiterate the definition of magnetic field, current coil, the right-hand rule, and Ampère's formula. This moment is important to reinforce the concepts and ensure that students understood the content.

2. Connection between Theory and Practice (1 - 2 minutes): The teacher highlights how the class connected theory with practice. They mention the activities carried out, such as building the current coil and applying the right-hand rule, which allowed students to visualize and experience the concept of magnetic field in action. The teacher emphasizes how the theoretical understanding of these concepts is fundamental for practical application in various everyday technologies.

3. Extra Materials (1 - 2 minutes): The teacher suggests extra materials for students to deepen their understanding of the magnetic field generated by a current coil. They can recommend books, websites, videos, and experiments that students can do at home. Some examples may include:

   • The book "Physics - Electromagnetism" by Halliday, Resnick, and Walker, which details the topic.
   • The website "Khan Academy," which offers videos and interactive exercises on the subject.
   • Oersted's experiment, which demonstrates the relationship between electric current and magnetic field.

4. Practical Applications (1 minute): Finally, the teacher reinforces the importance of the magnetic field generated by a current coil in various aspects of everyday life, such as in the generation of electric power, operation of motors and transformers, and even in technologies like computer hard drives. They conclude the class by encouraging students to observe these applications in everyday life, so they can see Physics in action and understand its relevance in society.

The Conclusion of the class is a valuable moment to consolidate learning, encourage self-study, and demonstrate the applicability of knowledge, motivating students to remain interested and engaged in the subject.