Basic Electricity - Senior Secondary 2 - Transmission of electricity

Transmission of electricity

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TERM: 1ST TERM

WEEK THREE

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC ELECTRICITY

Topic: TRANSMISSION OF ELECTRICITY

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Define the transmission of electricity

II.) State the methods of transmission of electricity

III.) Identify the components of electrical system

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 the meaning of transmission of electricity to the students

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher  discusses the methods of transmission of electricity and describes the components of electrical system.

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

TRANSMISSION OF ELECTRICITY

The transmission of electricity is the process of transporting electrical energy from power plants to consumers. It involves high-voltage power lines and substations to maintain efficiency over long distances.

Methods of transmission

  1. Overhead Lines: These are the most common method, utilizing tall towers and cables to carry electricity over long distances.
  2. Underground Cables: Cables buried underground for aesthetic reasons or in densely populated areas where overhead lines are impractical.
  3. Submarine Cables: Used to transmit electricity between mainland and offshore locations or across bodies of water.
  4. High Voltage Direct Current (HVDC): Efficient for long-distance transmission, converting alternating current (AC) to direct current (DC) for reduced energy losses.
  5. Flexible Alternating Current Transmission Systems (FACTS): Improve the efficiency and stability of AC transmission lines by controlling voltage and power flow.

Components of electrical system

The components of an electrical system include:

  1. Power Generation: Power plants, such as coal, natural gas, nuclear, hydroelectric, wind, and solar, produce electricity.
  2. Transmission: High-voltage transmission lines carry electricity over long distances from power plants to substations.
  3. Substations: These facilities step down high-voltage electricity to lower voltages for distribution to consumers.
  4. Distribution Lines: Lower-voltage lines distribute electricity from substations to homes, businesses, and other consumers.
  5. Transformers: These devices change the voltage levels to match the requirements of the electrical system.
  6. Circuit Breakers: Protect the system from overloads and faults by interrupting the flow of electricity when necessary.
  7. Switches: Control the flow of electricity, allowing for maintenance and repairs.
  8. Meters: Measure electricity usage for billing purposes.

EVALUATION: 1. What is transmission of electricity?

  1. State and describe 4 methods of transmission of electricity
  2. Identify 5 components of electrical system.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively