Use Solar Energy - Save Electricity
Telangana Board · Class 10 · Environmental Education
Flashcards for Use Solar Energy - Save Electricity — Telangana Board Class 10 Environmental Education. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is solar energy and why is it called an 'evergreen energy resource'?
Answer
Solar energy is energy obtained from the sun's radiation. It is called an 'evergreen energy resource' because it is renewable, never-ending, and always available as long as the sun exists. Unlike foss…
Which are the top 3 states in India for solar energy utilization and in what order?
Answer
1st place: Rajasthan, 2nd place: Gujarat, 3rd place: Karnataka. These states lead India in utilizing solar energy for various applications including agriculture, domestic use, and industries.
List five major applications where solar energy is widely used.
Answer
1. Agricultural fields (irrigation, crop drying), 2. Domestic purposes (water heating, lighting), 3. Offices (lighting, air conditioning), 4. Vehicles (solar cars, charging stations), 5. Industries (p…
Why should we paint house walls with light colors to save electricity?
Answer
Light-colored walls reflect more light and make rooms brighter naturally. Dark colors absorb light, making rooms appear dimmer, which requires using more electric bulbs to achieve the same brightness …
Compare LED bulbs with incandescent bulbs in terms of energy efficiency.
Answer
A 23-watt LED bulb produces the same amount of light as a 100-watt incandescent bulb, making LEDs about 75% more energy efficient. LEDs also last 15 times longer (average lifespan vs. 1000 hours for i…
What are the benefits of using solar water heaters?
Answer
Solar water heaters: 1. Reduce water heating costs, 2. Decrease dependence on gas and electricity, 3. Are pollution-free, 4. Use renewable solar energy, 5. Have low operating costs after initial insta…
Why should hot food be allowed to cool before putting it in the refrigerator?
Answer
Hot food increases the internal temperature of the refrigerator, forcing the compressor to work harder and consume more electricity to maintain the cool temperature. Allowing food to cool naturally sa…
What is the advantage of front-loader washing machines over standard models?
Answer
Front-loader washing machines consume 25% less energy than standard top-loading models. They also use less water, have better cleaning efficiency, and cause less wear and tear on clothes due to their …
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