What are thermal power plants? How will you demonstrate that thermal energy is converted into electrical energy?

Thermal power plants convert heat energy into electrical energy. In thermal power plants, fuels are burnt to heat up water to produce steam which is designed to run the turbine to generate electricity. In the class it can be demonstrated as follows:

Fig. Outlines for production of electricity at thermal power plant

Take a tennis ball and make three slits into it. Fit three small fins of a metal sheet into these slits. Fix the tennis ball on an axle as shown so that the ball has a free rotation. Now connect this axle to a bulb through a dynamo. Direct a jet of steam from a pressure cooker on to the fins of the ball. Soon the bulb will start glowing. It will remain glowing till the ball is rotating with the help of steam.

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What causes the wind to blow? Explain the principle of working of a windmill. State two advantages of using wind energy.

What are the main constituents of biogas? Describe with a labelled diagram how it is prepared in a fixed dome type plant. What is the advantage of this plant?

What is windmill? Draw a diagram to show how a windmill can be used to draw water from the ground.

Explain the classification of different sources of energy?

Sources of Energy

What are thermal power plants? How will you demonstrate that thermal energy is converted into electrical energy?