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प्रश्न
Which of the two is more energy efficient: filament type electric bulb or CFL? Why?
उत्तर
A compact fluorescent lamp (CFL) is more energy efficient, because it consumes much less electrical energy than a filament-type electric bulb.
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संबंधित प्रश्न
A good fuel is one which possesses:
(a) high calorific value and low ignition temperature
(b) high calorific value and high ignition temperature
(c) high calorific value and moderate ignition temperature
(d) low calorific value and moderate ignition temperature
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why?
The gravitational pull of the moon cause the sea-water to rise periodically.
(a) What name is given to the condition of the sea when water to rise periodically.
(b) What name is given to the condition of the sea when its raised water recedes?
(c) What name is given to the energy which can be harnessed from this natural phenomenon?
(d) Draw labelled diagram to show how this energy can be harnessed from this natural
Renewable source of energy is :
Fill in the blank
__________ are examples of renewable energy resources.
Give an account of the use of solar energy.
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Exhaustible natural resources are
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Nutsgilh is an example of inexhaustible natural resources.
