# Lesson Plan of Electricity

#### Students’ Learning Outcomes

·         Design an experiment to generate electricity.
·         Explain the working of the model generator.

#### Information for Teachers

·         Electricity generation is the process of generating electrical energy from other forms of energy.
·         We need electricity in our daily life.
·         We don’t find electricity just lying around ready for us to use. We have to generate it.
·         Dynamo converts the mechanical; energy into electrical energy.
·         Electrify is generated by using the energy from different sources i.e. fuels, coal, wind, hydro-electricity, solar, nuclear, Thermal power, tidal power,
·         Hydro-electric power stations generate electricity using water trapped behind the dams.

# Concept Map

#### Material / Resources

Dynamo, connecting wire, bulb, switch, hand pulley, wooden board, string, and bicycle fitted with dynamo

#### Worm up activity

·         Show the picture of a dam to the students and ask them:
Ø  What is happening in the picture?
Ø  What is the function of turbine?
·         Show the picture of a power station and ask the following questions:
Ø  Where does the electrical energy come to our houses?
(Expected response: From power station)
Ø  We use generators at our homes. What is its function?
(Expected response: Produce Electricity)
Ø  What is dynamo?
(Expected response: Dynamo converts mechanical energy into electrical energy)

#### Activity 1

·         Set the following apparatus according to the following diagram.
(Dynamo, connecting wire, bulb, switch, hand pulley, wooden board, string)
·         Demonstrate the working of this model electricity generator.
·         Ask different students to rotate the pulley and observe its effect on the bulb.
·         When pulley will be rotated, string attached to it will rotate the dynamo.3this in turn will make the bulb glowing.
·         Faster the pulley is rotated; more light will be produced by the bulb.
·         This experiment shows that potential energy provided by the hand is used to rotate pulley and dynamo converts this energy into electrical energy

#### Activity 2

·         Bring a bicycle fitted with dynamo in the class.
·         Ask a student to move the paddle of bicycle in order to move the wheel. As the dynamo is connected with the tire so it will also rotate.
·         The bulb connected with the dynamo will provide light.
·         Faster the wheel of the bicycle is moved; brighter will be the light of the bulb.
·         This indicates that the potential energy stored in human body is used to move the wheel, which turns the dynamo and electricity is produced.

### Sum up / Conclusion

·         Show the picture of a dam or hydro-electrical power station to the students and conclude the lesson by telling the students that model generator generate electricity by using other forms of energy.
A schematic view of a hydro-power plant

#### Assessment

·         As the following questions to assess the students:
Q1. How can we produce electricity on a large scale?
(Expected response: By using the energy from other sources).
Q2. Name the different energy sources we need to generate electricity.
(Expected response:  Fuels, hydro-electricity, wind etc
Q3. In a generator, what is the function of dynamo?
(Expected response: To convert mechanical energy into electrical energy).