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प्रश्न
Why are we looking at alternate sources of energy?
उत्तर
Fossil fuels which are traditionally used by human beings everywhere as an energy sources are non-renewable sources of energy. These sources of energy are limited and will disappear after some time. They are being consumed at a large rate. Therefore, we should conserve the energy sources. Hence, we should look for alternate sources of energy.
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संबंधित प्रश्न
Fill in the following blank with a suitable word:
The amount of heat produce by burning a unit mass of a fuel completely is known as its ............ value.
What is meant by a renewable source of energy? Give two examples of renewable sources of energy.
A non-renewable source of energy is:
(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas
The fuel having the lowest calorific value is:
(a) coal
(b) wood
(c) charcoal
(d) kerosene
Most of the fuels contain carbon as one of the constituents. Name a fuel which has very high calorific value but not contain carbon.
What is meant by conventional sources of energy? Write the names of two conventional sources of energy.
Compare the sun and the fossil fuels as the sources of energy.
Describe the construction and working of a biogas plant with the help of a labelled diagram.
State whether the following is True or False.
Coal and petroleum are renewable energy resources.
Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?
