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प्रश्न
Write a short note on electrical energy generation and environment.
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उत्तर
- Today, the generation of electrical energy has become essential, and life without electricity is almost unimaginable. Electrical energy is produced using various methods. A generator, based on the principle of electromagnetic induction, is used for this purpose. The generator is rotated by a turbine, which is driven by different energy sources.
- These energy sources can be renewable (such as wind and sunlight) or non-renewable (such as coal, petroleum, natural gas, and nuclear fuels). Renewable sources like wind and solar energy are environmentally friendly and economical. They do not cause pollution during operation.
- However, non-renewable sources such as coal, natural gas, and nuclear fuels can harm the environment. Burning fossil fuels releases soot particles and greenhouse gases like carbon dioxide and carbon monoxide. These gases contribute to air pollution and global warming.
- Nuclear energy also produces radioactive waste, which is harmful to both humans and the environment if not handled properly. Therefore, it is important to adopt eco-friendly alternatives to fossil fuels. Switching to green energy sources is essential for protecting our planet.
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संबंधित प्रश्न
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
Why is the copper tube of a solar water heater painted black from outside?
Name some of the solar energy devices.
Name the semi-conductor material which is usually used for making solar cells.
Why is the solar cooker box covered with a glass sheet?
The part of box-type solar cooker which is responsible for producing greenhouse effect is:
(a) plane mirror reflector
(b) black coating inside the box
(c) glass sheet cover
(d) utensils placed in the cooker box
The radiations present in sunlight which make a solar cooker work are:
(a) visible light rays
(b) ultraviolet rays
(c) comic rays
(d) infrared rays
Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place.
Which of the following is used in solar cooker to harvest the solar energy?
a) Solar panels
b) Silicon cell
c) Mirrors
d) Glass lid
Draw a neat and labelled diagram.
One solar panel produces a potential difference of 18 V and current of 3 A. Describe how you can obtain a potential difference of 72 Volts and current of 9 A with a solar array using solar panels. You can use sign of a battery for a solar panel.
Which of the following solar radiations pass through the atmosphere of Earth: X -rays, ultraviolet rays, visible light rays or infrared radiation?
What are the major utilizers of solar energy in the world?
Solar photovoltaic cells convert the solar radiation energy directly into ______ energy.
A silicon solar cell of dimension 1 sq.cm. generates __________ potential difference.
The potential difference available from a solar cell depends on its area.
Complete the following flow chart.
Solar energy is a renewable energy. How?
Write a note on Kamuthi Solar Project.
How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
