Test: Non Conventional Sources of Energy - Class 10 MCQ

Solar cells, also known as photovoltaic cells, primarily function to convert sunlight into electricity. When sunlight strikes these cells, it excites electrons, generating a flow of electricity, which can then be used to power various devices or feed into the electricity grid.

The largest wind farm cluster in India is situated in Tamil Nadu, specifically from Nagarcoil to Madurai. This region benefits from consistent wind patterns, making it ideal for harnessing wind energy, which contributes significantly to the state's power supply.

A solar cooker is specifically designed to use sunlight to cook food. It reflects solar radiation into an insulated box, trapping heat and cooking the food inside, demonstrating an efficient use of solar energy for practical applications.

Wind energy is classified as a non-conventional or renewable energy source, utilizing the natural movement of air to generate electricity. Unlike fossil fuels such as coal, natural gas, and oil, which are non-renewable and contribute to pollution, wind energy is clean and sustainable.

Tidal energy systems often have high initial setup costs due to the infrastructure required, but they benefit from low maintenance costs once operational. This makes them economically viable in the long term, especially in areas with consistent tidal patterns.

One of the main benefits of solar water heaters is their ability to significantly reduce energy bills. By using solar energy to heat water, households can decrease their reliance on electricity or gas, leading to lower utility costs over time.

Geothermal energy plants in India are primarily located in areas with hot springs, such as Manikaran in Himachal Pradesh and Puga Valley in Ladakh. These regions have geothermal reservoirs that can be tapped for energy production, using the Earth's natural heat.

Wind turbines can be installed on agricultural land, allowing landowners to generate additional income through lease agreements while continuing their farming activities. This dual-use approach benefits rural economies and promotes sustainable energy practices.

Geothermal energy is derived from the heat stored within the Earth's crust. It utilizes high temperatures from geothermal reservoirs to generate steam, which then drives turbines to produce electricity. This energy source is environmentally friendly and stable, regardless of weather conditions.

Nuclear energy is generated through the process of fission, where a large atomic nucleus splits into smaller nuclei, releasing a substantial amount of energy in the form of heat. This heat is used to produce steam, which drives turbines to generate electricity.

Methane is the primary component of biogas, produced through the anaerobic digestion of organic matter. Biogas is a clean fuel source that can be used for cooking and lighting, making it an efficient and environmentally friendly alternative to traditional fossil fuels.

A primary disadvantage of solar energy systems is that they can only generate electricity during daylight hours, limiting their efficiency without energy storage solutions. However, advancements in battery storage technology are addressing this limitation, allowing for greater utilization of solar energy.

Geothermal energy has a minimal environmental impact, producing low emissions of greenhouse gases and other pollutants. It is considered a clean energy source, as it harnesses the Earth's heat without the harmful effects associated with fossil fuel extraction and combustion.

The primary use of biogas produced in a digester is for cooking and lighting. Biogas serves as a clean fuel alternative, which can be particularly beneficial in rural areas where access to conventional energy sources is limited.

The black insulated box in a solar cooker is designed to retain heat, allowing the cooked food to absorb and maintain warmth. The black color absorbs solar radiation efficiently, while the insulation minimizes heat loss, making the cooking process more effective.

A Pressurized Water Reactor (PWR) keeps water under high pressure to prevent it from boiling. This allows the water to be heated and circulated through the reactor without turning into steam, effectively transferring heat to generate electricity.

Tidal energy is generated from the gravitational pull of the moon and the sun, causing the periodic rise and fall of ocean waters. This predictable movement can be harnessed to produce electricity, making it a reliable renewable energy source.

Biogas is primarily derived from the anaerobic degradation of organic matter, such as plant and animal waste. This renewable energy source not only provides fuel for cooking and lighting but also produces nutrient-rich byproducts that can be used as fertilizers, supporting sustainable agricultural practices.

Natural gas is a fossil fuel and is considered a conventional energy source, unlike solar, wind, and tidal energies, which are renewable and non-conventional. Renewable energy sources are crucial for reducing greenhouse gas emissions and combating climate change.

Tidal energy is a renewable and inexhaustible resource, harnessed from the predictable rise and fall of ocean tides. Unlike some other energy sources, tidal energy can be forecasted with high accuracy, making it a reliable power source for the future.