Daffodils English class 8

Ch - 8 

Solar energy 

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Multiple Choice Questions:

1. (i) A solar farm produces electricity from:

(a) Sun rays

2. (ii) Due to a decline in technological advances, solar panels remain:

(c) Costly (However, costs have been decreasing over time with new advancements.)

3. (iii) Nano dots are:

(a) Silicon coatings (Nano dots can also be made from other materials, but silicon-based ones are common in solar tech.)

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True or False:

1. Solawata is a village in Haryana. – T (Assuming the chapter mentions this specifically.)

2. Power from the 40-watt solar panel isn't sufficient for Rameshwarlal Choudhary's house. – T (40W is quite low for a household.)

3. Bio-mimicry is copying structures already found in nature. – T

4. A new design for solar panels has been unveiled by Tesla's C.E.O. Elon Musk. – T (Tesla has introduced solar roof tiles.)

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Short Answer Questions:

1. How has India improved its solar power capacity in the last three years?

India has increased its solar energy production through large-scale solar farms, government subsidies, and initiatives like the National Solar Mission.

2. Describe how solar power has helped Rameshwarlal Choudhary.

If referring to a specific case from the chapter, his home likely gained electricity access, improving living conditions, study hours, and daily activities.

3. What is the major problem with solar panels?

The high initial cost, efficiency limitations, and the need for sunlight availability are major challenges.

4. What has Elon Musk unveiled? Why has it been brought out?

He introduced solar roof tiles, designed to be both aesthetically appealing and efficient in generating electricity for homes.

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Long Answer Questions:

1. Who is Rameshwarlal Choudhary? What was his condition six months ago?

If the chapter discusses him specifically, he was likely someone struggling with limited electricity access before installing solar power.

2. When and where was the world's largest solar farm unveiled? Describe it.

The largest solar farms are in India, China, and the UAE. One of the biggest, Bhadla Solar Park in Rajasthan, has a capacity of over 2,200 MW.

3. What are nano dots? How do they work?

Nano dots are tiny semiconductor particles that improve solar panel efficiency by capturing more light energy.

4. What has Smartflower developed? How is it helpful?

Smartflower is a solar panel system that unfolds like a flower, tracks the sun, and increases energy efficiency.

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Reference to Context:

1. "With the extra light we can study until 10 pm."

(a) Likely a student benefiting from solar power.

(b) The extra light comes from a solar-powered source.

2. "The firm is also developing an 'Internet of Things' capability for the product."

(a) The firm could be Smartflower or Tesla (if referring to solar tech).

(b) The product is a solar panel system.

(c) The Internet of Things (IoT) refers to smart devices that connect and communicate via the internet.

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If your textbook provides specific answers, double-check those. Let me know if you need more details!