In a thermal power plant, fossil fuel (coal, oil or gas) is burnt up continuously to produce heat. This heat is used up to convert water into steam. The steam is utilised to run the turbine of power plant, as a result of which electrical energy produced.
In a thermal power plant, fossil fuel (coal, oil or gas) is burnt up continuously to
produce heat. This heat is used up to convert water into steam. The steam is utilised to run the turbine of power plant, as a result of which electrical energy produced.
(a) The new collector of the district is sympathetic to the problem faced by the villagers. He believes in welfare activity and took a prompt action in solving the problem brought to his notice. (b) Due to installation of solar panels the villagers (i) got rid of pollution caused by burning of wood,Read more
(a) The new collector of the district is sympathetic to the problem faced by the villagers. He believes in welfare activity and took a prompt action in solving the problem brought to his notice.
(b) Due to installation of solar panels the villagers (i) got rid of pollution caused by burning of wood, and (ii) were able to save money and valuable forest resources because solar energy is freely available and is a renewable form of energy.
Even though plants do not have muscle cells or nervous control, yet they show two types of movements: (a) Movement in response to stimulus i.e., Nastic movement. (b) Movement due to growth i.e., Tropic movement. Nastic movements are quick, in response to certain stimulus, for example 'touch' in 'TouRead more
Even though plants do not have muscle cells or nervous control, yet they show two types of movements:
(a) Movement in response to stimulus i.e., Nastic movement.
(b) Movement due to growth i.e., Tropic movement. Nastic movements are quick, in response to certain stimulus, for example ‘touch’ in ‘Touch me- not’ plant, reversible, not affected by the direction of the stimulus. Tropic movements on the other hand ate slow, growth related, irreversible and towards or away from the direction of the stimulus, for example, growth of roots towards the earth and growth of shoot towards sun.
Differences between transport of material in: Xylem:- (i) Movement of materials in one direction only. (ii) Only physical factors involved in transportation of water through xylem. (iii) Transportation of material through xylem is in form of a solution i.e', ions dissolved in water. Phloem:- (i) MovRead more
Differences between transport of material in:
Xylem:-
(i) Movement of materials in one direction only.
(ii) Only physical factors involved in transportation of water through xylem.
(iii) Transportation of material through xylem is in form of a solution i.e’, ions
dissolved in water.
Phloem:-
(i) Movement of materials in all directions
(ii) Translocation of organic solutes through phloem is an active Process, requiring energy.
(iii) Translocation through phloem is that of solute Le., sucrose
Explain how electricity is generated in a thermal power plant.
In a thermal power plant, fossil fuel (coal, oil or gas) is burnt up continuously to produce heat. This heat is used up to convert water into steam. The steam is utilised to run the turbine of power plant, as a result of which electrical energy produced.
In a thermal power plant, fossil fuel (coal, oil or gas) is burnt up continuously to
See lessproduce heat. This heat is used up to convert water into steam. The steam is utilised to run the turbine of power plant, as a result of which electrical energy produced.
ln a remote village of a hilly state, villagers were facing a lot of problems in daily life because of difficult terrain and their village was still not electrified. They were burning wood to keep the area lighted during night to keep away animals. This came to the knowledge of newly appointed collector of the district. He immediately installed solar panels in the village and lot of their problems were solved. (a) State the values exhibited by the collector. (b) Explain two advantages to the villagers due to installation of solar panels.
(a) The new collector of the district is sympathetic to the problem faced by the villagers. He believes in welfare activity and took a prompt action in solving the problem brought to his notice. (b) Due to installation of solar panels the villagers (i) got rid of pollution caused by burning of wood,Read more
(a) The new collector of the district is sympathetic to the problem faced by the villagers. He believes in welfare activity and took a prompt action in solving the problem brought to his notice.
See less(b) Due to installation of solar panels the villagers (i) got rid of pollution caused by burning of wood, and (ii) were able to save money and valuable forest resources because solar energy is freely available and is a renewable form of energy.
Calculate the resistance of 5 m length of a wire of area of cross-section 0.01 mm² and resistivity 5.03 x 10 ⁻8 ohm metre.
Here length L =5 m, area of cross-section A =0.01 mm² =0.01 x 10⁻⁶ m² = 1.0x10⁻⁸ m² and resistivity p = 5.03 x 10⁻⁸ = 25.15Ω
Here length L =5 m, area of cross-section A =0.01 mm² =0.01 x 10⁻⁶ m² = 1.0×10⁻⁸ m² and resistivity p = 5.03 x 10⁻⁸ = 25.15Ω
See lessIn the absence of muscle cells, how do plant cells show movements?
Even though plants do not have muscle cells or nervous control, yet they show two types of movements: (a) Movement in response to stimulus i.e., Nastic movement. (b) Movement due to growth i.e., Tropic movement. Nastic movements are quick, in response to certain stimulus, for example 'touch' in 'TouRead more
Even though plants do not have muscle cells or nervous control, yet they show two types of movements:
See less(a) Movement in response to stimulus i.e., Nastic movement.
(b) Movement due to growth i.e., Tropic movement. Nastic movements are quick, in response to certain stimulus, for example ‘touch’ in ‘Touch me- not’ plant, reversible, not affected by the direction of the stimulus. Tropic movements on the other hand ate slow, growth related, irreversible and towards or away from the direction of the stimulus, for example, growth of roots towards the earth and growth of shoot towards sun.
State the difference between transport of materials in xylem and phloem.
Differences between transport of material in: Xylem:- (i) Movement of materials in one direction only. (ii) Only physical factors involved in transportation of water through xylem. (iii) Transportation of material through xylem is in form of a solution i.e', ions dissolved in water. Phloem:- (i) MovRead more
Differences between transport of material in:
See lessXylem:-
(i) Movement of materials in one direction only.
(ii) Only physical factors involved in transportation of water through xylem.
(iii) Transportation of material through xylem is in form of a solution i.e’, ions
dissolved in water.
Phloem:-
(i) Movement of materials in all directions
(ii) Translocation of organic solutes through phloem is an active Process, requiring energy.
(iii) Translocation through phloem is that of solute Le., sucrose