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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
A solar water heater cannot be used to get hot water on
Why is the copper tube of a solar water heater painted black from outside?
What type of reactions occurring inside the sun produce solar energy?
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
Explain why, a plane mirror reflector is used in a box-type solar cooker.
Write the uses of solar cells.
Solar cells are made of:
(a) conductors
(b) insulators
(c) semi-conductors
(d) super-conductors
In order to make an efficient solar cooker, the cover of the cooker box should be made of:
A solar cooker may not cook food if
(a) the solar cooker is not placed in the shade
(b) the glass sheet cover of solar cooker is not closed
(c) a convex mirror reflector is not used
In a solar water heater, why is the storage tank placed at a higher lever than the solar panel containing coils?
Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place.
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 __________ potential difference.
The potential difference available from a solar cell depends on its area.
Give scientific reason.
Hydropower, solar energy and wind energy are called renewable energy.
Distinguish between the following.
Electricity generation from solar cells and solar thermal power generation
Solar energy is a non depleting energy. Justify.
Solar energy is a renewable energy. How?
The installed capacity of the Kamuthi solar power project is ______ MW.
