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प्रश्न
Complete the following flow chart.
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संबंधित प्रश्न
Why is the copper tube of a solar water heater painted black from outside?
Name some of the solar energy devices.
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
Name the device which converts sunlight into electricity.
How much solar energy will be received by 1 m2 area in one hour if the solar constant be 1.4 kW/m2?
Fill in the following blank with suitable word:
A solar cell converts ................ energy into ................ energy.
Name the semi-conductor material which is usually used for making solar cells.
What differences would you expect in the charging of car batteries (i) in bright sunlight (ii) on a cloudy day (iii) at night?
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.
What steps would you suggest to reduce energy consumption?
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.
Draw neat and labelled diagram.
One solar panel produces a potential difference of 18 V and current of 3 A. Describe how you can obtain a potential difference of 72 Volts and current of 9 A with a solar array using solar panels. You can use sign of a battery for a solar panel.
Two statements are given - one labelled Assertion (A) and the other labelled Reason (R).
Assertion (A): A solar cooker cooks the meal due to the greenhouse effect.
Reason (R): The plane mirror is responsible for producing the greenhouse effect.
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 |
Find an odd one out.
The potential difference available from a solar cell depends on its area.
State the importance of inverters.
Complete the table.
| Limitations of Solar energy | Limitations of Wind energy |
How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
