Advertisements
Advertisements
प्रश्न
Complete the following flow chart.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?
Why is the copper tube of a solar water heater painted black from outside?
Name some of the solar energy devices.
Fill in the following blank with suitable word:
A solar cell converts ................ energy into ................ energy.
What is a solar cell panel? For what purpose is it used? State its two main advantages.
Why is the solar cooker box covered with a glass sheet?
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
A solar cooker may not cook food if
(a) the solar cooker is not placed in the shade
(b) the glass sheet cover of solar cooker is not closed
(c) a convex mirror reflector is not used
In many applications, solar cells are connected to rechargeable batteries. Why is this so?
What steps would you suggest to reduce energy consumption?
Write a short note on electrical energy generation and environment.
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 |
A silicon solar cell of dimension 1 sq.cm. generates a current of about ___________.
The power produced from solar cells is a DC.
Solar energy is a non depleting energy. Justify.
Solar energy is a renewable energy. How?
Choose the correct statement.
______ is not harmful to the environment.
