Lesson Plan | Lesson Plan Tradisional | Electricity: Resistor Association

Objectives

Duration: (10 - 15 minutes)

This step aims to provide students with a clear understanding of the lesson's objectives, ensuring they know what to expect. It will help in directing the students' focus and preparing them for the learning ahead, making them aware of the skills they will develop throughout the lesson.

Objectives Utama:

1. Explain the fundamental concepts of series and parallel resistors.

2. Demonstrate how to calculate the equivalent resistor in various configurations.

3. Solve practical examples involving different combinations of resistors.

Introduction

Duration: (10 - 15 minutes)

This step seeks to grab the students' attention and ignite their interest in the subject matter. By illustrating the significance of resistors and sharing intriguing facts about the topic, it establishes a connection between theoretical lessons and their practical applications in life. This approach will help students appreciate the relevance of the topic and engage more deeply in the learning experience.

Did you know?

💡 Did you know: Resistor configurations are present in many electronic devices like remote controls, computers, and even cars? Additionally, the total resistance in a circuit can be finely adjusted to control electric current, which is key for both safety and efficiency in these systems.

Contextualization

To kick off the lesson on Resistor Configurations, it's vital to relate the topic to the students' everyday experiences. Emphasize that electricity plays a crucial role in our lives, from our daily electronic gadgets to the lighting in our homes. Convey that comprehending how resistors—components that regulate electric current—are linked in a circuit is essential for these devices to function effectively.

Concepts

Duration: (60 - 70 minutes)

This stage aims to deliver a thorough and practical understanding of resistor configurations, enabling students to grasp essential concepts and apply them in solving problems. By diving into specific topics and working through practical questions, students will reinforce their understanding and develop the skills necessary to calculate equivalent resistances in various circuit setups.

Relevant Topics

1. Concept of Series Resistors: Clarify that series resistors are connected one after the other, meaning the electric current that flows through one must pass through all others. Highlight that the total resistance for resistors in series is simply the sum of their individual resistances (R_total = R1 + R2 + ... + Rn).

2. Concept of Parallel Resistors: Explain that parallel resistors connect at the same entry and exit points of current. Emphasize that the total resistance in a parallel setup is calculated as the inverse of the sum of the inverses of the individual resistances (1/R_total = 1/R1 + 1/R2 + ... + 1/Rn).

3. Calculation of Equivalent Resistance: Show how to compute the equivalent resistance in circuits that combine series and parallel resistors. Offer practical examples and guide students through problem-solving step by step for clarity.

4. Symmetrical Resistor Configurations: Discuss the arrangement of symmetrically positioned resistors, teaching students to identify symmetry patterns, which can simplify the equivalent resistance calculation. Use illustrative examples to explain these concepts.

To Reinforce Learning

1. Calculate the equivalent resistance of three series resistors with values of 4Ω, 6Ω, and 8Ω.

2. Find the equivalent resistance of two parallel resistors with resistances of 10Ω and 15Ω.

3. In a circuit, two 5Ω resistors are placed in parallel and this combination is in series with a 10Ω resistor. What is the total equivalent resistance for this circuit?

Feedback

Duration: (15 - 20 minutes)

This step serves to reinforce the knowledge gained by students by revisiting and discussing the questions addressed during the lesson. This moment allows for clarifying doubts, enhancing understanding of the topic, and exploring various problem-solving methods. Furthermore, it encourages critical thinking and the practical application of learned concepts.

Diskusi Concepts

1. Question 1: Calculate the equivalent resistance of three series resistors with values of 4Ω, 6Ω, and 8Ω. 2. For series resistors, the total resistance is simply the sum of the individual resistances. Hence, the equivalent resistance (R_total) is calculated as: R_total = R1 + R2 + R3 = 4Ω + 6Ω + 8Ω = 18Ω. 3. Question 2: Find the equivalent resistance of two parallel resistors with resistances of 10Ω and 15Ω. 4. For parallel resistors, the total resistance is the inverse of the sum of the inverses of their individual resistances. The formula to use is: 1/R_total = 1/R1 + 1/R2. Thus, 1/R_total = 1/10Ω + 1/15Ω = (3/30) + (2/30) = 5/30. Invert this to get R_total = 30/5 = 6Ω. 5. Question 3: In a circuit, two 5Ω resistors are in parallel, and this setup is in series with a 10Ω resistor. What is the total equivalent resistance of the circuit? 6. First, calculate the equivalent resistance of the parallel resistors: 1/R_eq_parallel = 1/5Ω + 1/5Ω = 2/5Ω. Inverting gives R_eq_parallel = 5Ω/2 = 2.5Ω. Finally, add this to the series resistor's resistance: R_total = R_eq_parallel + R_series = 2.5Ω + 10Ω = 12.5Ω.

Engaging Students

1. 📌 Questions and Reflections: 2. What would be the impact on total resistance if more resistors were added in series? What about in parallel? 3. Why is the total resistance in a parallel circuit always less than the smallest individual resistance? 4. How does the arrangement of resistors affect the efficiency of electronic devices?

Conclusion

Duration: (10 - 15 minutes)

This step aims to review and consolidate the knowledge attained during the lesson. By summarizing key points, linking theory with practice, and spotlighting the topic's relevance, it ensures that students absorb the concepts and grasp their practical applications in everyday scenarios.

Summary

['Series resistors yield a total resistance that equals the sum of the individual resistances: R_total = R1 + R2 + ... + Rn.', 'For parallel resistors, total resistance is the inverse of the sum of the inverses of the individual resistances: 1/R_total = 1/R1 + 1/R2 + ... + 1/Rn.', 'Calculating the equivalent resistance in circuits combining series and parallel resistors necessitates step-by-step simplification of the circuits.', 'The grouping of symmetrical resistors can streamline the equivalent resistance calculation by spotting symmetry patterns.']

Connection

The lesson bridged theory and practice by showcasing how the fundamental concepts of series and parallel resistors apply in resolving practical problems. Comprehensive examples were methodically worked through, enabling students to see how theoretical knowledge translates into real-world electrical circuit questions.

Theme Relevance

Grasping resistor configurations is vital for designing and operating electronic devices. From basic remote controls to complex lighting setups, properly associating resistors is crucial for ensuring safety and efficiency. Precise control over electric currents is essential for component safety and energy conservation.