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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
A solar water heater cannot be used to get hot water on
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
What type of reactions occurring inside the sun produce solar energy?
State the advantages and disadvantages of using solar cells.
The part of box-type solar cooker which is responsible for producing greenhouse effect is:
(a) plane mirror reflector
(b) black coating inside the box
(c) glass sheet cover
(d) utensils placed in the cooker box
In order to make an efficient solar cooker, the cover of the cooker box should be made of:
In many applications, solar cells are connected to rechargeable batteries. Why is this so?
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.
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.
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.
A silicon solar cell of dimension 1 sq.cm. generates __________ potential difference.
Find an odd one out.
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
Complete the table.
| Limitations of Solar energy | Limitations of Wind energy |
What is the disadvantage of solar energy?
______ is not harmful to the environment.
______ is considered as a great source of energy.
