Lesson Plan in Technology and Livelihood Education – Electricity

Concept: Electricity is one form of energy which cannot be seen, but its presence can be felt due to numerous effects it

has in our daily living. The endless assortment of things that electricity does, in great part, can be broken down into

forms or combinations of three basic effects.

Value Concept: Electricity is vital but awareness on energy conservation/saving is important for today’s economic crisis.

I. Objectives: At the end of the lesson, the students are expected to:1. Explain the basic effects of electricity in our daily living.2. List examples of the basic effects of electricity in our daily living.3. Adhere to the importance of energy saving/conservation.

II. Subject Matter: Effects of ElectricityA. References:

Books : TLE by Estifania Gloria L. Lee, pp. 209-212 Practical Electrical Wiring by H.P. Richter, pp. 34-35

B. Internet: www.seai.ie/Schools/Secondary...4... Effects / Effects_of_Electricity / www1.curriculum.edu.au www.schoolnotes4u.com

C. Audio-Visual Materials: Power point presentation Simple Galvanometer Simple Electromagnet

III. Learning Activities:A. Motivation/Review:

1. Find out what students knew about electricity.2. Let students’ list ten names of appliances for two minutes.3. Today, we’ll find out some of the effects of electricity in our daily living.4. Play the power point slides.

B. Lesson/Discussion Proper:a. Discuss the possible lists of the students and lead them to the discussion that electricity as a form of energy

which cannot be seen but its presence gives comfort and convenience in our daily living. The endless assortment of things that electricity does, in great part, can be broken down into forms or combinations of three basic effects.

b. Explain the three basic effects of electricity in our daily livingb.1. Thermal Effect or Heating Effect. When current passes through metallic wires with high resistance with high resistance they become hot and they glow. A current cannot flow without causing some heat

1. Desired Heating Effects – intended to have heat like flatiron, rice cooker etc.2. Not Desired Heating effects – unintended like ordinary lamp

b.2. Magnetic Effect. When current flows through a copper wire, it is surrounded by a magnetic field - the area around the wire becomes magnetized immediately.1. Sounds like buzzer, doorbells, horns, speakers, etc2. Motion like electric motors, electric fans, washing machine, etc.3. Electromagnet 4. Galvanometer (analog or mechanical measuring instruments)

b.3. Chemical Effect. When an electric current passes through a liquid it may cause a chemical reaction to occur in the liquid-electrolysis. Electrical energy can be used to plate one metal in a thin layer onto another metal.

1. Electroplating – gold and silver plated utensils and jewelries2. Battery Charging – rechargeable batteries, car batteries

C. Generalization: Ask questions that would elicit ideas/concepts taken up. Below is the list:

Electricity is a form of energy called electrical energy. Electricity has numerous effects in our daily living. The endless assortment of things that electricity does, in great part, can be broken down into forms

or combinations of three basic effects. There are three basic effects of electricity : heating effect, magnetic effect, and chemical effect

D. Valuing/Application:Pose this problem to the student. Answers here may vary. An example would be: ELECTRICITY is vital but awareness on energy conservation/saving is important for today’s economic crisis.

The problem: If you were ironing your school uniform, what would be the best thing to apply energy saving?

IV. Assessment/Evaluation: A. The table below shows ten names of appliances/devices. Write the effects of electricity on the third

column based on the given names of appliances.No

.Appliances/Equipment Effects of Electricity

1 Electric stove2 Electric fan3 Doorbell4 Electric heater5 Loud speaker6 Electric bulb7 Battery (when it is being charged)8 Cellphone batteries9 Washing machine10 Rice cooker

B. Write TRUE if the statement is correct and FALSE if the statement is wrong.1. In our daily life we make use of different forms of energy 2. Electricity is a form of energy called electrical energy.3. The effects of electricity can be heard, felt, seen or smelled.4. When electric current passes through a wire it produces electricity.5. Many appliances work on the basis of one or more effects of electricity.

V. Assignment:1. What are the physiological effects of electricity?2. Refer to some FIRST AID books in the library and list down other first aid treatments you can apply when

a person is electrocuted.3. Be ready to share them before the class