TERM – 2^{ND} TERM
WEEK TEN
Class: Junior Secondary School 3
Age: 14 years
Duration: 40 minutes of 5 periods each
Date:
Subject: BASIC TECHNOLOGY
Topic: SIMPLE ELECTRICAL WIRING I
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,
demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
PRESENTATION |
TEACHER’S ACTIVITY |
STUDENT’S ACTIVITY |
STEP 1 INTRODUCTION |
The teacher explains what electric circuit is to the students |
Students pay attention |
STEP 2 EXPLANATION |
Teacher discusses the two types of electric circuit and compare them |
Students pay attention and participate |
STEP 3 DEMONSTRATION |
Teacher guide students to sketch series and parallel connection |
Students pay attention and participate |
STEP 4 NOTE TAKING |
The teacher writes a summarized note on the board |
The students copy the note in their books |
NOTE
SIMPLE ELECTRICAL WIRING I
Electric Circuit
An electric circuit is a closed loop or pathway through which electric current flows. It consists of interconnected components, such as resistors, capacitors, inductors, switches, and sources of electrical energy (like batteries or generators). The components in a circuit are connected by conductive wires that allow the flow of electric charge. Circuits can serve various purposes, from powering electronic devices to controlling complex systems.
Types of Electric Circuit
Characteristics:
- The total resistance is the sum of individual resistances.
- The current remains the same throughout the circuit.
- The voltage across the circuit is divided among the components.
- If one component fails (opens), the entire circuit is interrupted.
Characteristics:
- Each component has its own separate branch, and the current divides among the branches.
- The voltage across each component is the same.
- The total resistance is inversely proportional to the sum of the reciprocals of individual resistances.
- If one branch fails (opens), the others remain unaffected.
Comparison of series and parallel circuit
- Series: Voltage is divided among components.
- Parallel: Voltage is the same across all components.
- Series: Current is the same throughout the circuit.
- Parallel: Current divides among branches.
- Series: Total resistance is the sum of individual resistances.
- Parallel: Total resistance is inversely proportional to the sum of reciprocals of individual resistances.
- Series: If one component fails, the entire circuit is interrupted.
- Parallel: Failure in one branch doesn't affect others.
EVALUATION: 1. Define electric circuit.
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively