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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
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.
Why is the solar cooker box covered with a glass sheet?
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
What differences would you expect in the charging of car batteries (i) in bright sunlight (ii) on a cloudy day (iii) at night?
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?
Write a short note on electrical energy generation and environment.
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.
Find an odd one out.
Solar reflectors are important, why?
Solar energy is a non depleting energy. Justify.
Solar energy is a renewable energy. How?
What is the disadvantage of solar energy?
______ is not harmful to the environment.
How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
