Podcast
Questions and Answers
Which principle is NOT recommended for guiding initiatives in India's clean energy future?
Which principle is NOT recommended for guiding initiatives in India's clean energy future?
- Promote social and environmental equity
- Prioritize efficiency and competitiveness
- Invest in least-cost energy solutions
- Focus solely on fossil fuel investments (correct)
What is the main purpose of energy in our daily lives?
What is the main purpose of energy in our daily lives?
- To provide light, heat, and facilitate transportation (correct)
- To reduce environmental impact
- To create entertainment and leisure activities
- To generate wealth and economy
How is 1 tonne of oil equivalent (toe) related to energy?
How is 1 tonne of oil equivalent (toe) related to energy?
- It equals 10 Gcal
- It equals 41.868 Mtoe
- It equals 1000 kilojoules
- It equals 11.63 megawatt-hours (correct)
Which of the following is NOT considered a characteristic of energy sources?
Which of the following is NOT considered a characteristic of energy sources?
Which option best describes 'Mtoe'?
Which option best describes 'Mtoe'?
What percentage of India's total greenhouse gas emissions was attributed to the electricity sector in 2016–2017?
What percentage of India's total greenhouse gas emissions was attributed to the electricity sector in 2016–2017?
What was the percentage of India's electricity generation that came from coal in 2019–2020?
What was the percentage of India's electricity generation that came from coal in 2019–2020?
By 2022, what was the national renewable energy target set by the Indian government?
By 2022, what was the national renewable energy target set by the Indian government?
Which of the following is true about solar energy in India?
Which of the following is true about solar energy in India?
What was the installed capacity of coal in India's electricity supply in 2019–2020?
What was the installed capacity of coal in India's electricity supply in 2019–2020?
What is the average value of the solar constant (Isc) that defines average radiation on a perpendicular surface to sun rays reaching the earth?
What is the average value of the solar constant (Isc) that defines average radiation on a perpendicular surface to sun rays reaching the earth?
What term is used to describe the fraction of total solar radiant energy reflected back to space?
What term is used to describe the fraction of total solar radiant energy reflected back to space?
Which scattering process involves molecules of different gases leading to a depletion of solar radiation?
Which scattering process involves molecules of different gases leading to a depletion of solar radiation?
What is the range of mean monthly values of direct solar radiation received in India at 12 noon?
What is the range of mean monthly values of direct solar radiation received in India at 12 noon?
What is the term used to refer to the total amount of solar radiation energy?
What is the term used to refer to the total amount of solar radiation energy?
Which of the following gases has a role in selective absorption of solar radiation?
Which of the following gases has a role in selective absorption of solar radiation?
What is the intensity of solar radiation at the surface of the Sun?
What is the intensity of solar radiation at the surface of the Sun?
How much of the scattered radiation is typically lost to space?
How much of the scattered radiation is typically lost to space?
Which statement best describes a non-renewable energy source?
Which statement best describes a non-renewable energy source?
What is the main characteristic of renewable energy sources?
What is the main characteristic of renewable energy sources?
Electricity is classified as which type of energy source?
Electricity is classified as which type of energy source?
What is a critical consideration regarding energy consumption?
What is a critical consideration regarding energy consumption?
What does the term 'sustainability' in energy sources imply?
What does the term 'sustainability' in energy sources imply?
What is one key disadvantage of non-renewable energy sources?
What is one key disadvantage of non-renewable energy sources?
Which of the following is NOT a characteristic of renewable energy sources?
Which of the following is NOT a characteristic of renewable energy sources?
Why is it essential to consume energy in an efficient manner?
Why is it essential to consume energy in an efficient manner?
Who discovered the photovoltaic effect?
Who discovered the photovoltaic effect?
What was the efficiency of the solar cell reported by Bell laboratories in the 1950s?
What was the efficiency of the solar cell reported by Bell laboratories in the 1950s?
In which year was the first true solar cell reported?
In which year was the first true solar cell reported?
Which of the following materials is commonly used in solar cells?
Which of the following materials is commonly used in solar cells?
What is one of the key points discussed about solar cell technology?
What is one of the key points discussed about solar cell technology?
Which classification does not represent an energy source discussed?
Which classification does not represent an energy source discussed?
Which team was involved in advancing solar cell technology in the 1950s?
Which team was involved in advancing solar cell technology in the 1950s?
What is the primary function of photovoltaic cells?
What is the primary function of photovoltaic cells?
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Study Notes
Energy Consumption and Resources
- Energy is essential for life and is used for various purposes like lighting, heating, communication, manufacturing, and transportation
- We need to understand the characteristics of different energy sources and how they can be transformed.
- An average adult consumes energy throughout the day, with food being the primary source.
Primary Energy Sources
- Primary energy sources are finite and come from naturally occurring resources.
- Non-renewable energy sources are depleted on consumption and cannot be replenished at a speed comparable to their consumption
- Renewable Energy Sources are naturally available and provide a continuous flow of energy.
India's Energy Landscape
- India's electricity sector is its largest greenhouse gas emitter, accounting for 34% of the country's total emissions in 2016-2017.
- Coal dominates India's electricity supply, contributing 55% of the installed capacity and 72% of generation in 2019-2020.
- India has seen a rapid growth in renewable energy, primarily solar and wind, which have become the country's most cost-effective sources of electricity.
- The government of India has set a target of 175 GW of solar and wind energy by 2022 and 500 GW by 2030.
Solar Energy
- Solar energy is a renewable source, but it is affected by atmospheric conditions like absorption, scattering, and cloud cover.
- Albedo represents the fraction of solar radiation reflected back into space, with a value of 0.30 for Earth.
- Insolation, the solar radiation intensity on a surface, is measured in W/m2 or kW/m2, while irradiation is the total solar radiation energy measured in J/m2.
- Solar constant (Isc) is the average solar radiation reaching a surface perpendicular to the sun's rays, with a value of 1367 W/m2.
Photovoltaic Cells
- Edmond Becquerel discovered the photovoltaic effect in 1839.
- The first true solar cell was reported by Charles Fritts in 1894.
- Bell Laboratories made significant advancements in photovoltaic technology in the 1950s, using doped silicon to achieve 5.7% efficiency.
Studying Photovoltaic Cells
- Photovoltaic cells convert sunlight into electricity using semiconductor materials.
- Key aspects of studying solar cells include:
- Solar energy utilization.
- Classification of solar cells.
- Basic functioning of solar cells.
- Semiconductors in solar cells.
- Material development for solar cell technology.
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