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प्रश्न
Draw a 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.
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उत्तर
Given a potential difference of 18 V and a current of 3 A, the required output is a potential difference of 72 V and a current of 9 A. In a circuit, voltage stays the same when components are connected in parallel, but it increases when they are connected in series. On the other hand, current remains unchanged in a series connection, while it increases when components are connected in parallel.
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संबंधित प्रश्न
A solar water heater cannot be used to get hot water on
What type of reactions occurring inside the sun produce solar energy?
Name some of the solar energy devices.
Explain why, a plane mirror reflector is used in a box-type solar cooker.
State the advantages and disadvantages of using solar cells.
Why is the solar cooker box painted black from inside?
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
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 order to make an efficient solar cooker, the cover of the cooker box should be made of:
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?
Name two devices which can be utilised for the cooking of food so as to save fuel.
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 |
What is the disadvantage of solar energy?
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Choose the correct statement.
Observe the figure and label it properly:
- What is the figure related to?
- Why are reflectors used?
- Draw a flow chart showing different stages in such a process.
- How is the process used to generate electricity?
- What other method can be used to generate electricity using the same energy source?
