Non Conventional Sources Of Energy Previous Year Questions ICSE Class 10 Geography

Students of ICSE Class 10 should refer to Non Conventional Sources Of Energy ICSE Class 10 Geography previous year questions and solutions. below which have come in past board exams. You should always go through questions that have come in previous years. This will help you to understand the pattern of questions in ICSE Class 10 Geography and prepare accordingly. This will help you to get better marks in ICSE Class 10 Board Exams

ICSE Class 10 Geography Non Conventional Sources Of Energy Last Year Questions

Students should learn the important questions and answers given below for Chapter Non Conventional Sources Of Energy in Geography for ICSE Class 10. These board questions are expected to come in the upcoming exams. Students of ICSE Class 10th should go through the board exams questions and answers for ICSE Class 10 Geography which will help them to get more marks in exams.

Board Exam Questions Non Conventional Sources Of Energy ICSE Class 10 Geography

Question. Name any three devices used to harness solar energy.
Answer: (i) Solar cells
(ii) Solar cooker
(iii) Solar water heater

Question. Name the device used to harness wind energy.
Answer: Wind mill is used to harness wind energy.

Question. How do solar cookers work ?
Answer: (i) The mirrors on the glass sheet of the solar cooker reflects the sunlight into the inner walls of the solar cooker.
(ii) This causes the generation of heat energy that is used for cooking.

Question. What are solar cells also known as ? How do they convert solar energy into electricity ?
Answer: (i) They are also known as photovoltaic cells.
(ii) They are made of silicon and gallium. When sunlight strikes them, they solar energy, they convert it into electricity.

Question. How is electricity generated using nuclear power ?
Answer: (i) The heat energy obtained from nuclear fission is used to heat water and make steam.
(ii) The steam moves turbines which in turn run the generators which produce electricity.

Question. Give two advantages of using wind energy. OR What are the benefits of installing wind turbines ?
Answer: (i) Wind energy is a renewable source of energy which can be produced again and again.
(ii) It is the cleanest form of renewable energy which produces no pollution.
(iii) It reduces our dependence on the fossil fuels.

Question. State briefly how the sun’s energy can be used to generate power.
Answer: Solar photovoltaic systems and solar collectors are being used for powering. Solar cells : They are known as photovoltaic cells. Solar cells are made of thin wafers of semi conductor materials from silicon and gallium. When the sun’s radiations strike on them, the sun’s energy is converted into electricity. A group of solar cells join together in a solar panel can give out a large amount of solar energy and can produce electricity.

Question. What is nuclear power ?
Answer: Nuclear power is obtained from energy stored in the nuclei of atoms of naturally occuring radioactive elements like Uranium, Thorium and Plutonium.

Question. What are non-conventional sources of energy ?
Answer: (i) Non-conventional sources of energy are those which have been developed in the recent past as an alternative to conventional sources of energy.
(ii) These include solar energy, wind energy, tidal energy, geothermal
energy, nuclear energy and biogas.
(iii) They are renewable and therefore, inexhaustible, non-polluting, less expensive and easy to maintain.

Question. Name two places in India where geothermal plants are located.
Answer: In India, Geothermal plants are located in Manikaran in Himachal Pradesh
and Puga Valley in Ladakh.

Question. What are the chemical components of biogas ?
Answer: Biogas is composed of methane, carbon dioxide, hydrogen and hydrogen sulphide.

Question. How is geothermal energy used to produce electricity ?
Answer: (i) Resources of geothermal energy range from the shallow ground to steam, hot water and hot rock accessed by drilling wells up to thousands
of feet beneath the earth’s surface.
(ii) The extremely high temperatures in the deeper geothermal reservoirs are used for the generation of electricity. The high-pressure steam spins a turbine that rotates a generator and produces electricity.

Question. Why are non-conventional sources of energy preferred to conventional sources of energy ?
Answer: (i) Conventional sources of energy like coal and mineral oil cause pollution and are costlier than renewable sources of energy.
(ii) Non-conventional sources of energy are renewable and therefore, inexhaustibe, non-pollution, less expensive and easy to maintain. So, non-conventional sources of energy are preferred to conventional sources of energy.

Question. What is biogas ?
Answer: (i) Biogas is composed of methane, carbon dioxide, hydrogen and hydrogen sulphide.
(ii) It is produced by anaerobic degradation of animal and plant wastes in the presence of water.

Question. What are the advantages of using biogas ?
Answer: (i) Biogas is a clean, non-polluting and cheap.
(ii) There is direct supply of gas from the plant. Therefore, there is no storage problem.
(iii) The sludge left behind is a rich fertiliser containing bacterial biomass.

Question. How is biogas produced ?
Answer: (i) A digester tank is placed underground.
(ii) The digester tank receives the dung-water mixture through inlet pipe while the other side discharges the spent slurry through outlet pipe.
(iii) In the digester tank, there is a gas outlet which is controlled by a pipe.

Question. What are solar cells also known as ? How do they convert solar energy into electricity ?
Answer: (i) They are also known as photovoltaic cells.
(ii) They are made of silicon and gallium. When sunlight strikes them, they solar energy, they convert it into electricity.

Question. How is wind energy generated to produce electricity ?
Answer: (i) The wind energy is obtained by making use of windmills. The blades of the windmill rotate due to the force of the wind.
(ii) Wind mills or wind turbines constructed to capture the wind’s kinetic energy in a rotor consisting of two or more blades mechanically coupled to an electrical generator that converts kinetic energy to mechanical or electrical energy using suitable devices.

Question. How is India in an advantageous position to harness solar energy ?
Answer: (i) India is fortunate enough to receive higher amount of solar energy,
equivalent to 5,000 trillion kWh per year.
(ii) This is because of India’s location on the Tropic of Cancer.
(iii) Most parts of the country have 300 clear sunny days in a year and per hour per square km availability of solar energy is between 5 to 7 kW.

Question. What is geothermal energy ?
Answer: (i) Geothermal energy is the heat energy contained in the rock and fluid that fills the fractures and pores within the rock in the earth’s crust.
(ii) It is clean and sustainable.

Question. State two differences between conventional and non-conventional sources of energy.
Answer: