(b) Exhaustible sources are those sources of energy, which will deplete and exhaust after a few hundred years. Coal, petroleum, etc. are the exhaustible sources of energy. Inexhaustible resources of energy are those sources, which will not exhaust in future. These are unlimited. Bio-mass is one of tRead more
(b) Exhaustible sources are those sources of energy, which will deplete and exhaust after a few hundred years. Coal, petroleum, etc. are the exhaustible sources of energy. Inexhaustible resources of energy are those sources, which will not exhaust in future. These are unlimited. Bio-mass is one of the inexhaustible sources of energy. Yes. The options given in (a) and (b) are the same.
(a) The source of energy that replenishes in nature is known as renewable source of energy. Sun, wind, moving water, bio-mass, etc. are some of the examples of renewable sources of energy. The source of energy that does not replenish in nature is known as non-renewable source of energy. Coal, petrolRead more
(a) The source of energy that replenishes in nature is known as renewable source of energy. Sun, wind, moving water, bio-mass, etc. are some of the examples of renewable sources of energy. The source of energy that does not replenish in nature is known as non-renewable source of energy. Coal, petroleum, natural gas, etc. are some of the examples of non – renewable sources of energy.
(c) Very high tides are required in order to extract energy from tides. Tidal energy is harnessed by constructing a dam across a narrow opening to the sea. The locations where such dams can be built are limited. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-1Read more
(c) Very high tides are required in order to extract energy from tides. Tidal energy is harnessed by constructing a dam across a narrow opening to the sea. The locations where such dams can be built are limited.
(b) Very strong ocean waves are required in order to extract energy from waves. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
(b) Very strong ocean waves are required in order to extract energy from waves.
(a) Wind energy is harnessed by windmills. One of the limitations of extracting energy from wind is that a windmill requires wind of speed more than 15 km/h to generate electricity. Also, a large number of windmills are required, which covers a huge area. For a 1 MW generator, the farm needs about 2Read more
(a) Wind energy is harnessed by windmills. One of the limitations of extracting energy from wind is that a windmill requires wind of speed more than 15 km/h to generate electricity. Also, a large number of windmills are required, which covers a huge area. For a 1 MW generator, the farm needs about 2 hectares of land. The initial cost of establishment of the farm is quite high. Moreover, since the tower and blades are exposed to the vagaries of nature like rain, Sun, storm and cyclone, they need a high level of maintenance.
Bio-mass and hydro-electricity both are renewable sources of energy. • Bio-mass is derived from dead plants and animal wastes. Hence, it is naturally replenished. It is the result of natural processes. Wood, Gobar gas, etc. are some of the examples of bio – mass. • Hydro-electricity, on the other haRead more
Bio-mass and hydro-electricity both are renewable sources of energy.
• Bio-mass is derived from dead plants and animal wastes. Hence, it is naturally replenished. It is the result of natural processes. Wood, Gobar gas, etc. are some of the examples of bio – mass.
• Hydro-electricity, on the other hand, is obtained from the potential energy stored in water at a height (Making dams). Energy from it can be produced again and again. It is harnessed from water and obtained from mechanical processes.
• Fossil fuels are energy sources, such as coal and petroleum, obtained from underneath the Earth’s crust. They are directly available to human beings for use. Hence, fossil fuels are the direct source of energy. These are limited in amount. These are non-renewable sources of energy because these caRead more
• Fossil fuels are energy sources, such as coal and petroleum, obtained from underneath the Earth’s crust. They are directly available to human beings for use. Hence, fossil fuels are the direct source of energy. These are limited in amount. These are non-renewable sources of energy because these cannot be replenished in nature. Fossil fuels take millions of years for their formation. If the present fossil fuel of the Earth gets exhausted, its formation will take several years. Fossil fuels are also very costly.
• On the other hand, solar energy is a renewable and direct source of energy. The Sun has been shining for several years and will do so for the next five billion years. Solar energy is available free of cost to all in unlimited amount. It replenishes in the Sun itself.
(c) Nuclear energy is released during nuclear fission or fusion. These reactions produces tremendous amount of energy. The energy released during these reaction comes from the mass of elements (mass converts into energy). There is no roll of sunlight on these reactions. Hence, nuclear energy is notRead more
(c) Nuclear energy is released during nuclear fission or fusion. These reactions produces tremendous amount of energy. The energy released during these reaction comes from the mass of elements (mass converts into energy). There is no roll of sunlight on these reactions. Hence, nuclear energy is not ultimately derived from Sun’s energy.
Geothermal energy, wind energy, and bio-mass are all ultimately derived from solar energy.
Hence, the option (c) is correct.
(c) Bio-mass is a source of energy that is obtained from biodegradable natural things (plant materials and animal wastes). Nuclear energy is released during nuclear reactions like fission or fusion producing huge amount of energy. Hence, nuclear energy is not an example of bio-mass energy source. WoRead more
(c) Bio-mass is a source of energy that is obtained from biodegradable natural things (plant materials and animal wastes). Nuclear energy is released during nuclear reactions like fission or fusion producing huge amount of energy. Hence, nuclear energy is not an example of bio-mass energy source.
Wood is a plant material, Gobar gas is formed from animal dung and coal is a fossil fuel obtained from the buried remains of plants and animals. Hence, these are bio-mass products.
Hence, the option (c) is correct.
(b) A solar water heater uses solar energy to heat water. It requires day light (intense sunlight) to function properly. On a cloudy day, the sunlight reflects back in the sky from the clouds and is unable to reach the ground. Therefore, solar energy is not available for the solar heater to work proRead more
(b) A solar water heater uses solar energy to heat water. It requires day light (intense sunlight) to function properly. On a cloudy day, the sunlight reflects back in the sky from the clouds and is unable to reach the ground. Therefore, solar energy is not available for the solar heater to work properly. Hence, solar water heater does not function on a cloudy day.
Hence, the option (b) is correct.
On what basis would you classify energy sources as exhaustible and inexhaustible?
(b) Exhaustible sources are those sources of energy, which will deplete and exhaust after a few hundred years. Coal, petroleum, etc. are the exhaustible sources of energy. Inexhaustible resources of energy are those sources, which will not exhaust in future. These are unlimited. Bio-mass is one of tRead more
(b) Exhaustible sources are those sources of energy, which will deplete and exhaust after a few hundred years. Coal, petroleum, etc. are the exhaustible sources of energy. Inexhaustible resources of energy are those sources, which will not exhaust in future. These are unlimited. Bio-mass is one of the inexhaustible sources of energy. Yes. The options given in (a) and (b) are the same.
For more answers visit to website:
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On what basis would you classify energy sources as renewable and non-renewable?
(a) The source of energy that replenishes in nature is known as renewable source of energy. Sun, wind, moving water, bio-mass, etc. are some of the examples of renewable sources of energy. The source of energy that does not replenish in nature is known as non-renewable source of energy. Coal, petrolRead more
(a) The source of energy that replenishes in nature is known as renewable source of energy. Sun, wind, moving water, bio-mass, etc. are some of the examples of renewable sources of energy. The source of energy that does not replenish in nature is known as non-renewable source of energy. Coal, petroleum, natural gas, etc. are some of the examples of non – renewable sources of energy.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the limitations of extracting energy from tides?
(c) Very high tides are required in order to extract energy from tides. Tidal energy is harnessed by constructing a dam across a narrow opening to the sea. The locations where such dams can be built are limited. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-1Read more
(c) Very high tides are required in order to extract energy from tides. Tidal energy is harnessed by constructing a dam across a narrow opening to the sea. The locations where such dams can be built are limited.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the limitations of extracting energy from waves?
(b) Very strong ocean waves are required in order to extract energy from waves. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
(b) Very strong ocean waves are required in order to extract energy from waves.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the limitations of extracting energy from the wind?
(a) Wind energy is harnessed by windmills. One of the limitations of extracting energy from wind is that a windmill requires wind of speed more than 15 km/h to generate electricity. Also, a large number of windmills are required, which covers a huge area. For a 1 MW generator, the farm needs about 2Read more
(a) Wind energy is harnessed by windmills. One of the limitations of extracting energy from wind is that a windmill requires wind of speed more than 15 km/h to generate electricity. Also, a large number of windmills are required, which covers a huge area. For a 1 MW generator, the farm needs about 2 hectares of land. The initial cost of establishment of the farm is quite high. Moreover, since the tower and blades are exposed to the vagaries of nature like rain, Sun, storm and cyclone, they need a high level of maintenance.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
Compare and contrast bio-mass and hydroelectricity as sources of energy.
Bio-mass and hydro-electricity both are renewable sources of energy. • Bio-mass is derived from dead plants and animal wastes. Hence, it is naturally replenished. It is the result of natural processes. Wood, Gobar gas, etc. are some of the examples of bio – mass. • Hydro-electricity, on the other haRead more
Bio-mass and hydro-electricity both are renewable sources of energy.
• Bio-mass is derived from dead plants and animal wastes. Hence, it is naturally replenished. It is the result of natural processes. Wood, Gobar gas, etc. are some of the examples of bio – mass.
• Hydro-electricity, on the other hand, is obtained from the potential energy stored in water at a height (Making dams). Energy from it can be produced again and again. It is harnessed from water and obtained from mechanical processes.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
Compare and contrast fossil fuels and the Sun as direct sources of energy.
• Fossil fuels are energy sources, such as coal and petroleum, obtained from underneath the Earth’s crust. They are directly available to human beings for use. Hence, fossil fuels are the direct source of energy. These are limited in amount. These are non-renewable sources of energy because these caRead more
• Fossil fuels are energy sources, such as coal and petroleum, obtained from underneath the Earth’s crust. They are directly available to human beings for use. Hence, fossil fuels are the direct source of energy. These are limited in amount. These are non-renewable sources of energy because these cannot be replenished in nature. Fossil fuels take millions of years for their formation. If the present fossil fuel of the Earth gets exhausted, its formation will take several years. Fossil fuels are also very costly.
• On the other hand, solar energy is a renewable and direct source of energy. The Sun has been shining for several years and will do so for the next five billion years. Solar energy is available free of cost to all in unlimited amount. It replenishes in the Sun itself.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
(c) Nuclear energy is released during nuclear fission or fusion. These reactions produces tremendous amount of energy. The energy released during these reaction comes from the mass of elements (mass converts into energy). There is no roll of sunlight on these reactions. Hence, nuclear energy is notRead more
(c) Nuclear energy is released during nuclear fission or fusion. These reactions produces tremendous amount of energy. The energy released during these reaction comes from the mass of elements (mass converts into energy). There is no roll of sunlight on these reactions. Hence, nuclear energy is not ultimately derived from Sun’s energy.
Geothermal energy, wind energy, and bio-mass are all ultimately derived from solar energy.
Hence, the option (c) is correct.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
Which of the following is not an example of a bio-mass energy source?
(c) Bio-mass is a source of energy that is obtained from biodegradable natural things (plant materials and animal wastes). Nuclear energy is released during nuclear reactions like fission or fusion producing huge amount of energy. Hence, nuclear energy is not an example of bio-mass energy source. WoRead more
(c) Bio-mass is a source of energy that is obtained from biodegradable natural things (plant materials and animal wastes). Nuclear energy is released during nuclear reactions like fission or fusion producing huge amount of energy. Hence, nuclear energy is not an example of bio-mass energy source.
Wood is a plant material, Gobar gas is formed from animal dung and coal is a fossil fuel obtained from the buried remains of plants and animals. Hence, these are bio-mass products.
Hence, the option (c) is correct.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
A solar water heater cannot be used to get hot water on
(b) A solar water heater uses solar energy to heat water. It requires day light (intense sunlight) to function properly. On a cloudy day, the sunlight reflects back in the sky from the clouds and is unable to reach the ground. Therefore, solar energy is not available for the solar heater to work proRead more
(b) A solar water heater uses solar energy to heat water. It requires day light (intense sunlight) to function properly. On a cloudy day, the sunlight reflects back in the sky from the clouds and is unable to reach the ground. Therefore, solar energy is not available for the solar heater to work properly. Hence, solar water heater does not function on a cloudy day.
Hence, the option (b) is correct.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/