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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 type of reflector is used in a box-type solar cooker?
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.
What is a solar cell? Draw the labelled diagram of a solar cell.
The value of solar constant is:
(a) 1.4 kWh
(b) 1.4 kW/m
(c) 1.4 kW/m2
(d) 1.4 kW/m3
In a solar water heater, why is the storage tank placed at a higher lever than the solar panel containing coils?
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.
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?
Re-write the statement by selecting the appropriate option.
The solar lamp uses the ................... energy.
Solar photovoltaic cells convert the solar radiation energy directly into ______ energy.
The potential difference available from a solar cell depends on its area.
Solar reflectors are important, why?
State the importance of inverters.
Give scientific reason.
Hydropower, solar energy and wind energy are called renewable 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?
