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प्रश्न
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 |
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उत्तर
| Forms of Energy | Devices | |
| a. | Electric | Electric Fan, Electric iron |
| b. | Mechanical | Sewing machine, Bicycle |
| c. | Thermal | Steam Engine, Steam turbine |
| d. | Solar | Solar cooker, Solar heater |
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संबंधित प्रश्न
What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
How much solar energy will be received by 1 m2 area in one hour if the solar constant be 1.4 kW/m2?
What is a solar cell? Draw the labelled diagram of a solar cell.
Name the semi-conductor material which is usually used for making solar cells.
With the help of a labelled diagram, explain the construction and working of a solar cooker.
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
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 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
Observe the connections of cells shown in the following images.
i. Which connection will give maximum potential difference?
ii. Give one advantage and one disadvantage of this energy.
Re-write the statement by selecting the appropriate option.
The solar lamp uses the ................... energy.
The potential difference available from a solar cell depends on its area.
State the importance of inverters.
What is the disadvantage of solar energy?
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Kamuthi solar power project is situated in ______ district in Tamil Nadu.
______ is considered as a great source of energy.
