Notes and Study material for Exams
Semiconductor Devices:- Semiconductor devices are electronic components that exploit the electronic properties of semiconductor materials, principally silicon, germanium, and gallium arsenide, as well as organic semiconductors. Semiconductor devices have replaced thermionic devices (vacuum tubes) in most applications. There are two basic groups or classifications that can be used to define the different semiconductor types: Intrinsic … Read more
Solar Energy : Source, Solar heating devices, solar cooker solar cell Sunlight is Earth’s most abundant energy source and is delivered free of charge. Indeed, the energy from sunlight reaching the land surface of the earth is thousands of times greater than the world’s current total annual consumption of energy. Yet harnessing sunlight’s energy … Read more
Conventional and Non Conventional Sources of Energy Main Sources of Energy: The sources of energy are of following types: Conventional Sources of Energy: These sources of energy are also called non renewable sources. These sources of energy are in limited quantity except hydro-electric power. (a) Coal and Lignite: Coal is the major Source Of Energy. Coal … Read more
The Nebular Hypothesis: A Cosmic Story of Birth and Evolution The vast expanse of the cosmos, teeming with celestial bodies, has long captivated humanity’s imagination. From ancient myths to modern scientific inquiry, we have sought to understand the origins of our universe and the intricate tapestry of stars, planets, and galaxies that adorn it. Among … Read more
Unraveling the Mystery: Exploring Theories on the Origin of Earth The Earth, our home planet, is a marvel of complexity and beauty. From the towering mountains to the vast oceans, from the bustling cities to the serene wilderness, our planet teems with life and harbors a rich history. But how did this incredible world come … Read more
Energy Management When it comes to energy saving, energy management is the process of monitoring, controlling, and conserving energy in a building or organization. Typically this involves the following steps: Metering your energy consumption and collecting the data. Finding opportunities to save energy, and estimating how much energy each opportunity could save. You would typically … Read more
The Genesis of Our World: Unraveling the Origin of Earth The Earth, our home, is a vibrant tapestry of life, landscapes, and geological wonders. But beneath its bustling surface lies a story of immense cosmic drama, a story that stretches back billions of years to the very birth of our solar system. Understanding the origin … Read more
The Heat Budget of the Atmosphere: A Balancing Act of Energy The Earth’s atmosphere is a dynamic system, constantly in motion and responding to the influx and outflow of energy. This energy exchange, known as the heat budget, governs the planet’s climate and weather patterns. Understanding the intricate balance of incoming and outgoing radiation is … Read more
What are natural Resources ? Natural Resources are useful raw materials that we get from the Earth. They occur naturally, which means that humans cannot make natural resources. Instead, we use and modify natural resources in ways that are beneficial to us. The materials used in human-made objects are natural resources. Some examples of natural … Read more
Solar Energy : Source, Solar heating devices, solar cooker solar cell Sunlight is Earth’s most abundant energy source and is delivered free of charge. Indeed, the energy from sunlight reaching the land surface of the earth is thousands of times greater than the world’s current total annual consumption of energy. Yet harnessing sunlight’s energy content directly—rather than … Read more