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प्रश्न
Distinguish between the following.
Electricity generation from solar cells and solar thermal power generation
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उत्तर
| Electricity generation from solar cells | Solar thermal power generation | |
| i. | Solar radiation energy is converted directly into electrical energy. | The energy in solar radiation is first converted into thermal energy and then converted to electrical energy through various stages. |
| ii. | The electrical energy is generated directly by the photovoltaic effect. | The electrical energy is generated using reflectors, condenser, cooling tower, turbine and generator. |
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संबंधित प्रश्न
Name some of the solar energy devices.
Name that part of a box-type solar cooler which allow the sun's heat rays to enter the box but does not allow inside heat to go out.
With the help of a labelled diagram, explain the construction and working of a solar cooker.
Why is the solar cooker box painted black from inside?
Why is the solar cooker box covered with a glass sheet?
Solar cells are made of:
(a) conductors
(b) insulators
(c) semi-conductors
(d) super-conductors
The radiations present in sunlight which make a solar cooker work are:
(a) visible light rays
(b) ultraviolet rays
(c) comic rays
(d) infrared rays
If the solar constant is 1.4 kW/m2 then solar energy recived by 1m2area in one hour is:
(a) 5040 J
(b) 504.0 kJ
(c) 5040 kJ
(d) 5.04 kJ
Name one source of energy which is not derived from solar energy directly of indirectly.
Name two devices which can be utilised for the cooking of food so as to save fuel.
Which of the following is used in solar cooker to harvest the solar energy?
a) Solar panels
b) Silicon cell
c) Mirrors
d) Glass lid
Write a short note on electrical energy generation and environment.
Which of the following solar radiations pass through the atmosphere of Earth: X -rays, ultraviolet rays, visible light rays or infrared radiation?
A silicon solar cell of dimension 1 sq.cm. generates a current of about ___________.
Find an odd one out.
Solar reflectors are important, why?
Complete the following flow chart.
Solar energy is a renewable energy. How?
______ is considered as a great source of energy.
