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प्रश्न
Distinguish between the following.
Electricity generation from solar cells and solar thermal power generation
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उत्तर
| Electricity generation from solar cells | Solar thermal power generation | |
| i. | Solar radiation energy is converted directly into electrical energy. | The energy in solar radiation is first converted into thermal energy and then converted to electrical energy through various stages. |
| ii. | The electrical energy is generated directly by the photovoltaic effect. | The electrical energy is generated using reflectors, condenser, cooling tower, turbine and generator. |
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संबंधित प्रश्न
What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?
What type of reactions occurring inside the sun produce solar energy?
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
What is a solar cell? Draw the labelled diagram of a solar cell.
Write the uses of solar cells.
If the energy received by 5 m2 area in 10 minutes is 4200 kJ, calculate the value of solar constant.
Why is the solar cooker box painted black from inside?
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
The radiations present in sunlight which make a solar cooker work are:
(a) visible light rays
(b) ultraviolet rays
(c) comic rays
(d) infrared rays
Name one source of energy which is not derived from solar energy directly of indirectly.
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
Draw 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.
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.
What are the major utilizers of solar energy in the world?
Give scientific reason.
Hydropower, solar energy and wind energy are called renewable energy.
Complete the table.
| Limitations of Solar energy | Limitations of Wind energy |
Solar energy is a non depleting energy. Justify.
Write a note on Kamuthi Solar Project.
