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प्रश्न
Fill in the blank
Solar cells use the power supplied by the ______.
उत्तर
Solar cells use the power supplied by the Sunlight.
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संबंधित प्रश्न
Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.
State any four characteristics of a good source of energy.
What is meant by a renewable source of energy? Give two examples of renewable sources of energy.
Name any one hydrocarbon fraction obtained during the fractional distillation of petroleum which is used as a domestic fuel.
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
What are the various steps which can be taken to control (or reduce) pollution caused by burning fossil fuels?
Why is LPG considered a good fuel?
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
How does substance X make the detection of leakage of LPG easy?
The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.
How does this device help in controlling air pollution?
What are the raw materials used for making biogas?
The major component of biogas is:
(a) hydrogen
(b) butane
(c) hydrogen sulphide
(d) methane
Which of the following is ultimately not derived from the sun's energy (or solar energy)?
(a) wind energy
(b) nuclear energy
(c) biomass energy
(d) ocean thermal energy
You have three unlabelled test tubes containing ethanol, ethanoic acid and soap solution. Explain the method you would use to identify the compounds in different test tubes by chemical tests using litmus paper and sodium metal.
What are non-renewable resources of energy? Give two examples of such resources.
Answer the following question.
Write the name of the main constituent of Biogas. Also, state its percentage.
Which of the following is a non-renewable source of energy?
Acid rain happens because ______.
Choose the incorrect statement regarding wind power
Why is there a need to harness non-conventional sources of energy? Give two main reasons.
Sunlight and air are inexhaustible natural resources. Comment.
