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प्रश्न
Fill in the blank
Solar cells use the power supplied by the ______.
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उत्तर
Solar cells use the power supplied by the Sunlight.
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संबंधित प्रश्न
What is the difference between a renewable and a non-renewable source of energy? Explain with examples.
Calorific value and ignition temperature of fuel X are 75 kJ/g and 20°C respectively. These values for fuel Y are 50 kj/g and 75°C respectively. On burning, the fuel Y produces only CO2while fuel X produces CO2 and CO. Which of the two is a better fuel? Give two reasons to support your answer.
Name any four fractions obtained from petroleum which are used as fuels.
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
Coal cannot be converted into one of the following forms of energy. This is:
(a) coal gas
(b) electricity
(c) oil
(d) charcoal
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.
Name the device
What is biomass? Give three examples of biomass.
Suggest a safe and efficient method for the disposal of biowastes and sewage materials. How is this method advantageous to us?
Most of the sources of energy that we sue represent stored solar energy. Which of the following is not ultimately derived from the sun's energy?
(a) wind energy
(b) geothermal energy
(c) fossil fuels
(d) biomass
The constituent of biogas which makes it an excellent fuel is:
(a) butane
(b) methane
(c) propane
(d) ethane
The major component of biogas is:
(a) hydrogen
(b) butane
(c) hydrogen sulphide
(d) methane
What type of nuclear reaction is responsible for the liberation of energy:
in a nuclear reactor?
Which of the two is more energy efficient: filament type electric bulb or CFL? Why?
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.
State whether the following is True or False.
Coal takes millions of years to form.
State whether the following is True or False.
The Sardar Sarovar Dam is built on the river Narmada.
Why is charcoal considered better fuel than wood?
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Which of the following is a pair of exhaustible natural resources?
