NCERT Activity 14.3 Class 10 Science | Sources of Energy

 In this post, you are going to read NCERT activity 14.3 class 10 science, sources of energy. You will find a complete explanation of activity 14.3 class 10 science with a conclusion. You can also go through chapter 14 sources of energy.

NCERT Activity 14.3 Class 10 Science | Sources of Energy

In this activity, we will learn about a model to demonstrate the process of thermoelectric production with a suitable diagram.

Thermoelectric production class 10

Activity 14.3  Class 10 Science

    ·      Take a table tennis ball and make three slits into it.

    ·      Put semi-circular fins cut out of a metal sheet into these slits.

    ·      Pivot the tennis all on an axle through its center with a straight metal wire fixed to a rigid support. Ensure that the tennis ball rotates freely about the axle.

    ·      Now connect a cycle dynamo to this

    ·      Connect a bulb in series.

    ·      Direct a jet of water or steam produced in a pressure cooker at the fins.

    ·      What do you observe?

Explanation

This apparatus works as a model of a small thermal power plant. This tennis ball fitted with a metal sheet act as a small turbine. The turbine connects with the armature of the dynamo and produces electricity.

Electricity, when passes through the bulb, the bulb glows.

Conclusion

In this activity, we can see the heat energy converts water into steam which is converted into electricity by the dynamo.

Important terms

    1.   Turbine – It is a device with rotating blades.

    2.   Dynamo – The device that converts mechanical energy into electricity. It is also called a generator.

 

Queries based on activity 14.3 class 10 science

    1.   Name the device which converts mechanical energy into electrical energy.

Ans.- Dynamo or generator

    2.   Name the energy which converts water into steam.

Ans.-  Heat energy

    3.   Name the device that rotates the shaft of the dynamo.

     Ans.- Turbine

 

 Related Topics - 

1. Next activity - Activity 14.4 Class 10 Science

2. Previous activity-  Activity 14.2 Class 10 Science

2. NCERT solutions of Chapter 14 

3. Extra Questions of Chapter 14