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प्रश्न
Solar reflectors are important, why?
What is the importance/ function of a solar reflector?
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उत्तर
The solar panel consists of many reflectors that reflect and concentrate solar radiations on absorbers.
संबंधित प्रश्न
What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?
A solar water heater cannot be used to get hot water on
What is a solar cell panel? For what purpose is it used? State its two main advantages.
If the energy received by 5 m2 area in 10 minutes is 4200 kJ, calculate the value of solar constant.
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?
The value of solar constant is:
(a) 1.4 kWh
(b) 1.4 kW/m
(c) 1.4 kW/m2
(d) 1.4 kW/m3
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
In many applications, solar cells are connected to rechargeable batteries. Why is this so?
Name two devices which can be utilised for the cooking of food so as to save fuel.
What steps would you suggest to reduce energy consumption?
Make a table based on forms of energy and corresponding devices:
| Forms of Energy | Devices | |
| a. | Electric | _________ |
| b. | Mechanical | Sewing machine, Bicycle |
| c. | Thermal | __________ |
| d. | _________ | Solar cooker, Solar heater |
A silicon solar cell of dimension 1 sq.cm. generates a current of about ___________.
The potential difference available from a solar cell depends on its area.
Distinguish between the following.
Electricity generation from solar cells and solar thermal power generation
What is the disadvantage of solar energy?
______ is considered as a great source of energy.
The installed capacity of the Kamuthi solar power project is ______ MW.
Write a note on Kamuthi Solar Project.
